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685 lines
25 KiB
685 lines
25 KiB
<?php |
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/*======================================================================= |
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// File: JPGRAPH_UTILS.INC |
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// Description: Collection of non-essential "nice to have" utilities |
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// Created: 2005-11-20 |
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// Ver: $Id: jpgraph_utils.inc.php 1777 2009-08-23 17:34:36Z ljp $ |
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// |
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// Copyright (c) Asial Corporation. All rights reserved. |
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//======================================================================== |
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*/ |
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//=================================================== |
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// CLASS FuncGenerator |
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// Description: Utility class to help generate data for function plots. |
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// The class supports both parametric and regular functions. |
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//=================================================== |
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class FuncGenerator { |
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private $iFunc='',$iXFunc='',$iMin,$iMax,$iStepSize; |
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|
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function __construct($aFunc,$aXFunc='') { |
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$this->iFunc = $aFunc; |
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$this->iXFunc = $aXFunc; |
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} |
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function E($aXMin,$aXMax,$aSteps=50) { |
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$this->iMin = $aXMin; |
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$this->iMax = $aXMax; |
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$this->iStepSize = ($aXMax-$aXMin)/$aSteps; |
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|
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if( $this->iXFunc != '' ) |
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$t = 'for($i='.$aXMin.'; $i<='.$aXMax.'; $i += '.$this->iStepSize.') {$ya[]='.$this->iFunc.';$xa[]='.$this->iXFunc.';}'; |
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elseif( $this->iFunc != '' ) |
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$t = 'for($x='.$aXMin.'; $x<='.$aXMax.'; $x += '.$this->iStepSize.') {$ya[]='.$this->iFunc.';$xa[]=$x;} $x='.$aXMax.';$ya[]='.$this->iFunc.';$xa[]=$x;'; |
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else |
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JpGraphError::RaiseL(24001);//('FuncGenerator : No function specified. '); |
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@eval($t); |
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// If there is an error in the function specifcation this is the only |
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// way we can discover that. |
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if( empty($xa) || empty($ya) ) |
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JpGraphError::RaiseL(24002);//('FuncGenerator : Syntax error in function specification '); |
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return array($xa,$ya); |
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} |
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} |
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//============================================================================= |
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// CLASS DateScaleUtils |
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// Description: Help to create a manual date scale |
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//============================================================================= |
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define('DSUTILS_MONTH',1); // Major and minor ticks on a monthly basis |
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define('DSUTILS_MONTH1',1); // Major and minor ticks on a monthly basis |
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define('DSUTILS_MONTH2',2); // Major ticks on a bi-monthly basis |
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define('DSUTILS_MONTH3',3); // Major icks on a tri-monthly basis |
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define('DSUTILS_MONTH6',4); // Major on a six-monthly basis |
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define('DSUTILS_WEEK1',5); // Major ticks on a weekly basis |
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define('DSUTILS_WEEK2',6); // Major ticks on a bi-weekly basis |
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define('DSUTILS_WEEK4',7); // Major ticks on a quod-weekly basis |
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define('DSUTILS_DAY1',8); // Major ticks on a daily basis |
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define('DSUTILS_DAY2',9); // Major ticks on a bi-daily basis |
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define('DSUTILS_DAY4',10); // Major ticks on a qoud-daily basis |
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define('DSUTILS_YEAR1',11); // Major ticks on a yearly basis |
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define('DSUTILS_YEAR2',12); // Major ticks on a bi-yearly basis |
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define('DSUTILS_YEAR5',13); // Major ticks on a five-yearly basis |
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class DateScaleUtils { |
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public static $iMin=0, $iMax=0; |
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private static $starthour,$startmonth, $startday, $startyear; |
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private static $endmonth, $endyear, $endday; |
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private static $tickPositions=array(),$minTickPositions=array(); |
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private static $iUseWeeks = true; |
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static function UseWeekFormat($aFlg) { |
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self::$iUseWeeks = $aFlg; |
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} |
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static function doYearly($aType,$aMinor=false) { |
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$i=0; $j=0; |
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$m = self::$startmonth; |
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$y = self::$startyear; |
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if( self::$startday == 1 ) { |
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self::$tickPositions[$i++] = mktime(0,0,0,$m,1,$y); |
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} |
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++$m; |
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switch( $aType ) { |
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case DSUTILS_YEAR1: |
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for($y=self::$startyear; $y <= self::$endyear; ++$y ) { |
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if( $aMinor ) { |
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while( $m <= 12 ) { |
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if( !($y == self::$endyear && $m > self::$endmonth) ) { |
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self::$minTickPositions[$j++] = mktime(0,0,0,$m,1,$y); |
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} |
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++$m; |
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} |
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$m=1; |
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} |
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self::$tickPositions[$i++] = mktime(0,0,0,1,1,$y); |
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} |
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break; |
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case DSUTILS_YEAR2: |
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$y=self::$startyear; |
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while( $y <= self::$endyear ) { |
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self::$tickPositions[$i++] = mktime(0,0,0,1,1,$y); |
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for($k=0; $k < 1; ++$k ) { |
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++$y; |
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if( $aMinor ) { |
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self::$minTickPositions[$j++] = mktime(0,0,0,1,1,$y); |
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} |
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} |
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++$y; |
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} |
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break; |
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case DSUTILS_YEAR5: |
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$y=self::$startyear; |
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while( $y <= self::$endyear ) { |
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self::$tickPositions[$i++] = mktime(0,0,0,1,1,$y); |
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for($k=0; $k < 4; ++$k ) { |
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++$y; |
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if( $aMinor ) { |
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self::$minTickPositions[$j++] = mktime(0,0,0,1,1,$y); |
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} |
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} |
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++$y; |
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} |
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break; |
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} |
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} |
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static function doDaily($aType,$aMinor=false) { |
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$m = self::$startmonth; |
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$y = self::$startyear; |
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$d = self::$startday; |
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$h = self::$starthour; |
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$i=0;$j=0; |
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if( $h == 0 ) { |
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self::$tickPositions[$i++] = mktime(0,0,0,$m,$d,$y); |
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} |
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$t = mktime(0,0,0,$m,$d,$y); |
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switch($aType) { |
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case DSUTILS_DAY1: |
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while( $t <= self::$iMax ) { |
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$t = strtotime('+1 day',$t); |
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self::$tickPositions[$i++] = $t; |
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if( $aMinor ) { |
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self::$minTickPositions[$j++] = strtotime('+12 hours',$t); |
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} |
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} |
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break; |
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case DSUTILS_DAY2: |
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while( $t <= self::$iMax ) { |
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$t = strtotime('+1 day',$t); |
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if( $aMinor ) { |
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self::$minTickPositions[$j++] = $t; |
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} |
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$t = strtotime('+1 day',$t); |
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self::$tickPositions[$i++] = $t; |
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} |
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break; |
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case DSUTILS_DAY4: |
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while( $t <= self::$iMax ) { |
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for($k=0; $k < 3; ++$k ) { |
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$t = strtotime('+1 day',$t); |
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if( $aMinor ) { |
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self::$minTickPositions[$j++] = $t; |
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} |
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} |
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$t = strtotime('+1 day',$t); |
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self::$tickPositions[$i++] = $t; |
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} |
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break; |
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} |
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} |
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static function doWeekly($aType,$aMinor=false) { |
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$hpd = 3600*24; |
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$hpw = 3600*24*7; |
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// Find out week number of min date |
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$thursday = self::$iMin + $hpd * (3 - (date('w', self::$iMin) + 6) % 7); |
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$week = 1 + (date('z', $thursday) - (11 - date('w', mktime(0, 0, 0, 1, 1, date('Y', $thursday)))) % 7) / 7; |
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$daynumber = date('w',self::$iMin); |
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if( $daynumber == 0 ) $daynumber = 7; |
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$m = self::$startmonth; |
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$y = self::$startyear; |
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$d = self::$startday; |
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$i=0;$j=0; |
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// The assumption is that the weeks start on Monday. If the first day |
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// is later in the week then the first week tick has to be on the following |
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// week. |
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if( $daynumber == 1 ) { |
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self::$tickPositions[$i++] = mktime(0,0,0,$m,$d,$y); |
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$t = mktime(0,0,0,$m,$d,$y) + $hpw; |
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} |
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else { |
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$t = mktime(0,0,0,$m,$d,$y) + $hpd*(8-$daynumber); |
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} |
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switch($aType) { |
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case DSUTILS_WEEK1: |
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$cnt=0; |
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break; |
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case DSUTILS_WEEK2: |
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$cnt=1; |
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break; |
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case DSUTILS_WEEK4: |
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$cnt=3; |
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break; |
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} |
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while( $t <= self::$iMax ) { |
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self::$tickPositions[$i++] = $t; |
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for($k=0; $k < $cnt; ++$k ) { |
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$t += $hpw; |
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if( $aMinor ) { |
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self::$minTickPositions[$j++] = $t; |
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} |
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} |
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$t += $hpw; |
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} |
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} |
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static function doMonthly($aType,$aMinor=false) { |
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$monthcount=0; |
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$m = self::$startmonth; |
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$y = self::$startyear; |
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$i=0; $j=0; |
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// Skip the first month label if it is before the startdate |
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if( self::$startday == 1 ) { |
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self::$tickPositions[$i++] = mktime(0,0,0,$m,1,$y); |
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$monthcount=1; |
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} |
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if( $aType == 1 ) { |
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if( self::$startday < 15 ) { |
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self::$minTickPositions[$j++] = mktime(0,0,0,$m,15,$y); |
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} |
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} |
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++$m; |
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// Loop through all the years included in the scale |
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for($y=self::$startyear; $y <= self::$endyear; ++$y ) { |
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// Loop through all the months. There are three cases to consider: |
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// 1. We are in the first year and must start with the startmonth |
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// 2. We are in the end year and we must stop at last month of the scale |
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// 3. A year in between where we run through all the 12 months |
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$stopmonth = $y == self::$endyear ? self::$endmonth : 12; |
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while( $m <= $stopmonth ) { |
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switch( $aType ) { |
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case DSUTILS_MONTH1: |
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// Set minor tick at the middle of the month |
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if( $aMinor ) { |
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if( $m <= $stopmonth ) { |
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if( !($y==self::$endyear && $m==$stopmonth && self::$endday < 15) ) |
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self::$minTickPositions[$j++] = mktime(0,0,0,$m,15,$y); |
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} |
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} |
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// Major at month |
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// Get timestamp of first hour of first day in each month |
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self::$tickPositions[$i++] = mktime(0,0,0,$m,1,$y); |
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break; |
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case DSUTILS_MONTH2: |
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if( $aMinor ) { |
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// Set minor tick at start of each month |
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self::$minTickPositions[$j++] = mktime(0,0,0,$m,1,$y); |
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} |
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// Major at every second month |
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// Get timestamp of first hour of first day in each month |
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if( $monthcount % 2 == 0 ) { |
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self::$tickPositions[$i++] = mktime(0,0,0,$m,1,$y); |
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} |
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break; |
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case DSUTILS_MONTH3: |
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if( $aMinor ) { |
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// Set minor tick at start of each month |
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self::$minTickPositions[$j++] = mktime(0,0,0,$m,1,$y); |
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} |
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// Major at every third month |
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// Get timestamp of first hour of first day in each month |
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if( $monthcount % 3 == 0 ) { |
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self::$tickPositions[$i++] = mktime(0,0,0,$m,1,$y); |
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} |
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break; |
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case DSUTILS_MONTH6: |
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if( $aMinor ) { |
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// Set minor tick at start of each month |
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self::$minTickPositions[$j++] = mktime(0,0,0,$m,1,$y); |
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} |
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// Major at every third month |
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// Get timestamp of first hour of first day in each month |
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if( $monthcount % 6 == 0 ) { |
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self::$tickPositions[$i++] = mktime(0,0,0,$m,1,$y); |
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} |
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break; |
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} |
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++$m; |
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++$monthcount; |
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} |
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$m=1; |
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} |
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// For the case where all dates are within the same month |
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// we want to make sure we have at least two ticks on the scale |
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// since the scale want work properly otherwise |
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if(self::$startmonth == self::$endmonth && self::$startyear == self::$endyear && $aType==1 ) { |
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self::$tickPositions[$i++] = mktime(0 ,0 ,0, self::$startmonth + 1, 1, self::$startyear); |
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} |
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return array(self::$tickPositions,self::$minTickPositions); |
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} |
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static function GetTicks($aData,$aType=1,$aMinor=false,$aEndPoints=false) { |
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$n = count($aData); |
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return self::GetTicksFromMinMax($aData[0],$aData[$n-1],$aType,$aMinor,$aEndPoints); |
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} |
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static function GetAutoTicks($aMin,$aMax,$aMaxTicks=10,$aMinor=false) { |
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$diff = $aMax - $aMin; |
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$spd = 3600*24; |
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$spw = $spd*7; |
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$spm = $spd*30; |
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$spy = $spd*352; |
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if( self::$iUseWeeks ) |
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$w = 'W'; |
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else |
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$w = 'd M'; |
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// Decision table for suitable scales |
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// First value: Main decision point |
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// Second value: Array of formatting depending on divisor for wanted max number of ticks. <divisor><formatting><format-string>,.. |
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$tt = array( |
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array($spw, array(1,DSUTILS_DAY1,'d M',2,DSUTILS_DAY2,'d M',-1,DSUTILS_DAY4,'d M')), |
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array($spm, array(1,DSUTILS_DAY1,'d M',2,DSUTILS_DAY2,'d M',4,DSUTILS_DAY4,'d M',7,DSUTILS_WEEK1,$w,-1,DSUTILS_WEEK2,$w)), |
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array($spy, array(1,DSUTILS_DAY1,'d M',2,DSUTILS_DAY2,'d M',4,DSUTILS_DAY4,'d M',7,DSUTILS_WEEK1,$w,14,DSUTILS_WEEK2,$w,30,DSUTILS_MONTH1,'M',60,DSUTILS_MONTH2,'M',-1,DSUTILS_MONTH3,'M')), |
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array(-1, array(30,DSUTILS_MONTH1,'M-Y',60,DSUTILS_MONTH2,'M-Y',90,DSUTILS_MONTH3,'M-Y',180,DSUTILS_MONTH6,'M-Y',352,DSUTILS_YEAR1,'Y',704,DSUTILS_YEAR2,'Y',-1,DSUTILS_YEAR5,'Y'))); |
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$ntt = count($tt); |
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$nd = floor($diff/$spd); |
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for($i=0; $i < $ntt; ++$i ) { |
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if( $diff <= $tt[$i][0] || $i==$ntt-1) { |
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$t = $tt[$i][1]; |
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$n = count($t)/3; |
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for( $j=0; $j < $n; ++$j ) { |
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if( $nd/$t[3*$j] <= $aMaxTicks || $j==$n-1) { |
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$type = $t[3*$j+1]; |
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$fs = $t[3*$j+2]; |
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list($tickPositions,$minTickPositions) = self::GetTicksFromMinMax($aMin,$aMax,$type,$aMinor); |
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return array($fs,$tickPositions,$minTickPositions,$type); |
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} |
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} |
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} |
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} |
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} |
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static function GetTicksFromMinMax($aMin,$aMax,$aType,$aMinor=false,$aEndPoints=false) { |
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self::$starthour = date('G',$aMin); |
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self::$startmonth = date('n',$aMin); |
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self::$startday = date('j',$aMin); |
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self::$startyear = date('Y',$aMin); |
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self::$endmonth = date('n',$aMax); |
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self::$endyear = date('Y',$aMax); |
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self::$endday = date('j',$aMax); |
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self::$iMin = $aMin; |
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self::$iMax = $aMax; |
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if( $aType <= DSUTILS_MONTH6 ) { |
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self::doMonthly($aType,$aMinor); |
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} |
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elseif( $aType <= DSUTILS_WEEK4 ) { |
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self::doWeekly($aType,$aMinor); |
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} |
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elseif( $aType <= DSUTILS_DAY4 ) { |
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self::doDaily($aType,$aMinor); |
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} |
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elseif( $aType <= DSUTILS_YEAR5 ) { |
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self::doYearly($aType,$aMinor); |
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} |
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else { |
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JpGraphError::RaiseL(24003); |
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} |
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// put a label at the very left data pos |
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if( $aEndPoints ) { |
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$tickPositions[$i++] = $aData[0]; |
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} |
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|
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// put a label at the very right data pos |
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if( $aEndPoints ) { |
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$tickPositions[$i] = $aData[$n-1]; |
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} |
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return array(self::$tickPositions,self::$minTickPositions); |
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} |
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} |
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|
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//============================================================================= |
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// Class ReadFileData |
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//============================================================================= |
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Class ReadFileData { |
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//---------------------------------------------------------------------------- |
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// Desciption: |
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// Read numeric data from a file. |
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// Each value should be separated by either a new line or by a specified |
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// separator character (default is ','). |
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// Before returning the data each value is converted to a proper float |
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// value. The routine is robust in the sense that non numeric data in the |
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// file will be discarded. |
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// |
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// Returns: |
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// The number of data values read on success, FALSE on failure |
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//---------------------------------------------------------------------------- |
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static function FromCSV($aFile,&$aData,$aSepChar=',',$aMaxLineLength=1024) { |
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$rh = @fopen($aFile,'r'); |
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if( $rh === false ) { |
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return false; |
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} |
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$tmp = array(); |
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$lineofdata = fgetcsv($rh, 1000, ','); |
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while ( $lineofdata !== FALSE) { |
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$tmp = array_merge($tmp,$lineofdata); |
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$lineofdata = fgetcsv($rh, $aMaxLineLength, $aSepChar); |
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} |
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fclose($rh); |
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|
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// Now make sure that all data is numeric. By default |
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// all data is read as strings |
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$n = count($tmp); |
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$aData = array(); |
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$cnt=0; |
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for($i=0; $i < $n; ++$i) { |
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if( $tmp[$i] !== "" ) { |
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$aData[$cnt++] = floatval($tmp[$i]); |
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} |
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} |
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return $cnt; |
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} |
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|
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//---------------------------------------------------------------------------- |
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// Desciption: |
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// Read numeric data from a file. |
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// Each value should be separated by either a new line or by a specified |
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// separator character (default is ','). |
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// Before returning the data each value is converted to a proper float |
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// value. The routine is robust in the sense that non numeric data in the |
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// file will be discarded. |
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// |
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// Options: |
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// 'separator' => ',', |
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// 'enclosure' => '"', |
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// 'readlength' => 1024, |
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// 'ignore_first' => false, |
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// 'first_as_key' => false |
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// 'escape' => '\', # PHP >= 5.3 only |
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// |
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// Returns: |
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// The number of lines read on success, FALSE on failure |
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//---------------------------------------------------------------------------- |
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static function FromCSV2($aFile, &$aData, $aOptions = array()) { |
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$aDefaults = array( |
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'separator' => ',', |
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'enclosure' => chr(34), |
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'escape' => chr(92), |
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'readlength' => 1024, |
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'ignore_first' => false, |
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'first_as_key' => false |
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); |
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|
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$aOptions = array_merge( |
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$aDefaults, is_array($aOptions) ? $aOptions : array()); |
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|
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if( $aOptions['first_as_key'] ) { |
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$aOptions['ignore_first'] = true; |
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} |
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|
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$rh = @fopen($aFile, 'r'); |
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|
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if( $rh === false ) { |
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return false; |
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} |
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|
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$aData = array(); |
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$aLine = fgetcsv($rh, |
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$aOptions['readlength'], |
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$aOptions['separator'], |
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$aOptions['enclosure'] |
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/*, $aOptions['escape'] # PHP >= 5.3 only */ |
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); |
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|
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// Use numeric array keys for the columns by default |
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// If specified use first lines values as assoc keys instead |
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$keys = array_keys($aLine); |
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if( $aOptions['first_as_key'] ) { |
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$keys = array_values($aLine); |
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} |
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|
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$num_lines = 0; |
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$num_cols = count($aLine); |
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|
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while ($aLine !== false) { |
|
if( is_array($aLine) && count($aLine) != $num_cols ) { |
|
JpGraphError::RaiseL(24004); |
|
// 'ReadCSV2: Column count mismatch in %s line %d' |
|
} |
|
|
|
// fgetcsv returns NULL for empty lines |
|
if( !is_null($aLine) ) { |
|
$num_lines++; |
|
|
|
if( !($aOptions['ignore_first'] && $num_lines == 1) && is_numeric($aLine[0]) ) { |
|
for( $i = 0; $i < $num_cols; $i++ ) { |
|
$aData[ $keys[$i] ][] = floatval($aLine[$i]); |
|
} |
|
} |
|
} |
|
|
|
$aLine = fgetcsv($rh, |
|
$aOptions['readlength'], |
|
$aOptions['separator'], |
|
$aOptions['enclosure'] |
|
/*, $aOptions['escape'] # PHP >= 5.3 only*/ |
|
); |
|
} |
|
|
|
fclose($rh); |
|
|
|
if( $aOptions['ignore_first'] ) { |
|
$num_lines--; |
|
} |
|
|
|
return $num_lines; |
|
} |
|
|
|
// Read data from two columns in a plain text file |
|
static function From2Col($aFile, $aCol1, $aCol2, $aSepChar=' ') { |
|
$lines = @file($aFile,FILE_IGNORE_NEW_LINES|FILE_SKIP_EMPTY_LINES); |
|
if( $lines === false ) { |
|
return false; |
|
} |
|
$s = '/[\s]+/'; |
|
if( $aSepChar == ',' ) { |
|
$s = '/[\s]*,[\s]*/'; |
|
} |
|
elseif( $aSepChar == ';' ) { |
|
$s = '/[\s]*;[\s]*/'; |
|
} |
|
foreach( $lines as $line => $datarow ) { |
|
$split = preg_split($s,$datarow); |
|
$aCol1[] = floatval(trim($split[0])); |
|
$aCol2[] = floatval(trim($split[1])); |
|
} |
|
|
|
return count($lines); |
|
} |
|
|
|
// Read data from one columns in a plain text file |
|
static function From1Col($aFile, $aCol1) { |
|
$lines = @file($aFile,FILE_IGNORE_NEW_LINES|FILE_SKIP_EMPTY_LINES); |
|
if( $lines === false ) { |
|
return false; |
|
} |
|
foreach( $lines as $line => $datarow ) { |
|
$aCol1[] = floatval(trim($datarow)); |
|
} |
|
|
|
return count($lines); |
|
} |
|
|
|
static function FromMatrix($aFile,$aSepChar=' ') { |
|
$lines = @file($aFile,FILE_IGNORE_NEW_LINES|FILE_SKIP_EMPTY_LINES); |
|
if( $lines === false ) { |
|
return false; |
|
} |
|
$mat = array(); |
|
$reg = '/'.$aSepChar.'/'; |
|
foreach( $lines as $line => $datarow ) { |
|
$row = preg_split($reg,trim($datarow)); |
|
foreach ($row as $key => $cell ) { |
|
$row[$key] = floatval(trim($cell)); |
|
} |
|
$mat[] = $row; |
|
} |
|
return $mat; |
|
} |
|
|
|
|
|
} |
|
|
|
define('__LR_EPSILON', 1.0e-8); |
|
//============================================================================= |
|
// Class LinearRegression |
|
//============================================================================= |
|
class LinearRegression { |
|
private $ix=array(),$iy=array(); |
|
private $ib=0, $ia=0; |
|
private $icalculated=false; |
|
public $iDet=0, $iCorr=0, $iStdErr=0; |
|
|
|
public function __construct($aDataX,$aDataY) { |
|
if( count($aDataX) !== count($aDataY) ) { |
|
JpGraph::Raise('LinearRegression: X and Y data array must be of equal length.'); |
|
} |
|
$this->ix = $aDataX; |
|
$this->iy = $aDataY; |
|
} |
|
|
|
public function Calc() { |
|
|
|
$this->icalculated = true; |
|
|
|
$n = count($this->ix); |
|
$sx2 = 0 ; |
|
$sy2 = 0 ; |
|
$sxy = 0 ; |
|
$sx = 0 ; |
|
$sy = 0 ; |
|
|
|
for( $i=0; $i < $n; ++$i ) { |
|
$sx2 += $this->ix[$i] * $this->ix[$i]; |
|
$sy2 += $this->iy[$i] * $this->iy[$i]; |
|
$sxy += $this->ix[$i] * $this->iy[$i]; |
|
$sx += $this->ix[$i]; |
|
$sy += $this->iy[$i]; |
|
} |
|
|
|
if( $n*$sx2 - $sx*$sx > __LR_EPSILON ) { |
|
$this->ib = ($n*$sxy - $sx*$sy) / ( $n*$sx2 - $sx*$sx ); |
|
$this->ia = ( $sy - $this->ib*$sx ) / $n; |
|
|
|
$sx = $this->ib * ( $sxy - $sx*$sy/$n ); |
|
$sy2 = $sy2 - $sy*$sy/$n; |
|
$sy = $sy2 - $sx; |
|
|
|
$this->iDet = $sx / $sy2; |
|
$this->iCorr = sqrt($this->iDet); |
|
if( $n > 2 ) { |
|
$this->iStdErr = sqrt( $sy / ($n-2) ); |
|
} |
|
else { |
|
$this->iStdErr = NAN ; |
|
} |
|
} |
|
else { |
|
$this->ib = 0; |
|
$this->ia = 0; |
|
} |
|
|
|
} |
|
|
|
public function GetAB() { |
|
if( $this->icalculated == false ) |
|
$this->Calc(); |
|
return array($this->ia, $this->ib); |
|
} |
|
|
|
public function GetStat() { |
|
if( $this->icalculated == false ) |
|
$this->Calc(); |
|
return array($this->iStdErr, $this->iCorr, $this->iDet); |
|
} |
|
|
|
public function GetY($aMinX, $aMaxX, $aStep=1) { |
|
if( $this->icalculated == false ) |
|
$this->Calc(); |
|
|
|
$yy = array(); |
|
$i = 0; |
|
for( $x=$aMinX; $x <= $aMaxX; $x += $aStep ) { |
|
$xx[$i ] = $x; |
|
$yy[$i++] = $this->ia + $this->ib * $x; |
|
} |
|
|
|
return array($xx,$yy); |
|
} |
|
|
|
} |
|
|
|
?>
|
|
|