<?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 1.16.2.2 2004/12/13 00:49:30 aditus 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;			for( $i=0; $i<$numpoints; ++$i) {	    if( $exist_x ) 		$x=$this->coords[1][$i];	    else 		$x=$i;	    if( !is_numeric($x) ||  		!is_numeric($this->coords[0][$i*2]) || !is_numeric($this->coords[0][$i*2+1]) ) {		continue;	    }	    	    $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 */?>