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| <?php |
| /*======================================================================= |
| // File: JPGRAPH_ERROR.PHP |
| // Description: Error plot extension for JpGraph |
| // Created: 2001-01-08 |
| // Author: Johan Persson (johanp@aditus.nu) |
| // Ver: $Id: jpgraph_error.php,v 1.1 2004/06/15 10:13:19 jpm Exp $ |
| // |
| // License: This code is released under QPL |
| // Copyright (C) 2001,2002 Johan Persson |
| //======================================================================== |
| */ |
| |
| //=================================================== |
| // CLASS ErrorPlot |
| // Description: Error plot with min/max value for |
| // each datapoint |
| //=================================================== |
| class ErrorPlot extends Plot { |
| var $errwidth=2; |
| //--------------- |
| // CONSTRUCTOR |
| function ErrorPlot(&$datay,$datax=false) { |
| $this->Plot($datay,$datax); |
| $this->numpoints /= 2; |
| } |
| //--------------- |
| // PUBLIC METHODS |
| |
| // Gets called before any axis are stroked |
| function PreStrokeAdjust(&$graph) { |
| if( $this->center ) { |
| $a=0.5; $b=0.5; |
| ++$this->numpoints; |
| } else { |
| $a=0; $b=0; |
| } |
| $graph->xaxis->scale->ticks->SetXLabelOffset($a); |
| $graph->SetTextScaleOff($b); |
| //$graph->xaxis->scale->ticks->SupressMinorTickMarks(); |
| } |
| |
| // Method description |
| function Stroke(&$img,&$xscale,&$yscale) { |
| $numpoints=count($this->coords[0])/2; |
| $img->SetColor($this->color); |
| $img->SetLineWeight($this->weight); |
| |
| if( isset($this->coords[1]) ) { |
| if( count($this->coords[1])!=$numpoints ) |
| JpGraphError::Raise("Number of X and Y points are not equal. Number of X-points:".count($this->coords[1])." Number of Y-points:$numpoints"); |
| else |
| $exist_x = true; |
| } |
| else |
| $exist_x = false; |
| |
| if( $exist_x ) |
| $xs=$this->coords[1][0]; |
| else |
| $xs=0; |
| |
| |
| for( $i=0; $i<$numpoints; ++$i) { |
| if( $exist_x ) $x=$this->coords[1][$i]; |
| else $x=$i; |
| $xt = $xscale->Translate($x); |
| $yt1 = $yscale->Translate($this->coords[0][$i*2]); |
| $yt2 = $yscale->Translate($this->coords[0][$i*2+1]); |
| $img->Line($xt,$yt1,$xt,$yt2); |
| $img->Line($xt-$this->errwidth,$yt1,$xt+$this->errwidth,$yt1); |
| $img->Line($xt-$this->errwidth,$yt2,$xt+$this->errwidth,$yt2); |
| } |
| return true; |
| } |
| } // Class |
| |
| |
| //=================================================== |
| // CLASS ErrorLinePlot |
| // Description: Combine a line and error plot |
| // THIS IS A DEPRECATED PLOT TYPE JUST KEPT FOR |
| // BACKWARD COMPATIBILITY |
| //=================================================== |
| class ErrorLinePlot extends ErrorPlot { |
| var $line=null; |
| //--------------- |
| // CONSTRUCTOR |
| function ErrorLinePlot(&$datay,$datax=false) { |
| $this->ErrorPlot($datay,$datax); |
| // Calculate line coordinates as the average of the error limits |
| for($i=0; $i < count($datay); $i+=2 ) { |
| $ly[]=($datay[$i]+$datay[$i+1])/2; |
| } |
| $this->line=new LinePlot($ly,$datax); |
| } |
| |
| //--------------- |
| // PUBLIC METHODS |
| function Legend(&$graph) { |
| if( $this->legend != "" ) |
| $graph->legend->Add($this->legend,$this->color); |
| $this->line->Legend($graph); |
| } |
| |
| function Stroke(&$img,&$xscale,&$yscale) { |
| parent::Stroke($img,$xscale,$yscale); |
| $this->line->Stroke($img,$xscale,$yscale); |
| } |
| } // Class |
| |
| |
| //=================================================== |
| // CLASS LineErrorPlot |
| // Description: Combine a line and error plot |
| //=================================================== |
| class LineErrorPlot extends ErrorPlot { |
| var $line=null; |
| //--------------- |
| // CONSTRUCTOR |
| // Data is (val, errdeltamin, errdeltamax) |
| function LineErrorPlot(&$datay,$datax=false) { |
| $ly=array(); $ey=array(); |
| $n = count($datay); |
| if( $n % 3 != 0 ) { |
| JpGraphError::Raise('Error in input data to LineErrorPlot.'. |
| 'Number of data points must be a multiple of 3'); |
| } |
| for($i=0; $i < count($datay); $i+=3 ) { |
| $ly[]=$datay[$i]; |
| $ey[]=$datay[$i]+$datay[$i+1]; |
| $ey[]=$datay[$i]+$datay[$i+2]; |
| } |
| $this->ErrorPlot($ey,$datax); |
| $this->line=new LinePlot($ly,$datax); |
| } |
| |
| //--------------- |
| // PUBLIC METHODS |
| function Legend(&$graph) { |
| if( $this->legend != "" ) |
| $graph->legend->Add($this->legend,$this->color); |
| $this->line->Legend($graph); |
| } |
| |
| function Stroke(&$img,&$xscale,&$yscale) { |
| parent::Stroke($img,$xscale,$yscale); |
| $this->line->Stroke($img,$xscale,$yscale); |
| } |
| } // Class |
| |
| |
| /* EOF */ |
| ?> |