[Sommaire] [Imprimer]

   1  <?php 
   2  /*=======================================================================
   3  // File:    JPGRAPH_SCATTER.PHP
   4  // Description: Scatter (and impuls) plot extension for JpGraph
   5  // Created:     2001-02-11
   6  // Author:    Johan Persson (johanp@aditus.nu)
   7  // Ver:        $Id: jpgraph_scatter.php 18250 2005-05-07 14:13:43Z ralfbecker $
   8  //
   9  // License:    This code is released under GPL 2.0
  10  // Copyright (C) 2001 Johan Persson
  11  //========================================================================
  12  */
  13  
  14  //===================================================
  15  // CLASS ScatterPlot
  16  // Description: Render X and Y plots
  17  //===================================================
  18  class ScatterPlot extends Plot {
  19      var $impuls = false;
  20      var $linkpoints = false, $linkpointweight=1, $linkpointcolor="black";
  21  //---------------
  22  // CONSTRUCTOR
  23      function ScatterPlot(&$datay,$datax=false) {
  24      if( (count($datax) != count($datay)) && is_array($datax))
  25          JpGraphError::Raise("JpGraph: Scatterplot must have equal number of X and Y points.");
  26      $this->Plot($datay,$datax);
  27      $this->mark = new PlotMark();
  28      $this->mark->SetType(MARK_CIRCLE);
  29      $this->mark->SetColor($this->color);
  30      }
  31  
  32  //---------------
  33  // PUBLIC METHODS    
  34      function SetImpuls($f=true) {
  35      $this->impuls = $f;
  36      }
  37  
  38      // Combine the scatter plot points with a line
  39      function SetLinkPoints($f=true,$lpc="black",$weight=1) {
  40      $this->linkpoints=$f;
  41      $this->linkpointcolor=$lpc;
  42      $this->linkpointweight=$weight;
  43      }
  44  
  45      function Stroke(&$img,&$xscale,&$yscale) {
  46      $ymin=$yscale->scale_abs[0];
  47      if( $yscale->scale[0] < 0 )
  48          $yzero=$yscale->Translate(0);
  49      else
  50          $yzero=$yscale->scale_abs[0];
  51      for( $i=0; $i<$this->numpoints; ++$i ) {
  52          if( isset($this->coords[1]) )
  53          $xt = $xscale->Translate($this->coords[1][$i]);
  54          else
  55          $xt = $xscale->Translate($i);
  56          $yt = $yscale->Translate($this->coords[0][$i]);    
  57          if( $this->linkpoints && isset($yt_old) ) {
  58          $img->SetColor($this->linkpointcolor);
  59          $img->SetLineWeight($this->linkpointweight);
  60          $img->Line($xt_old,$yt_old,$xt,$yt);
  61          }
  62          if( $this->impuls ) {
  63          $img->SetColor($this->color);
  64          $img->SetLineWeight($this->weight);
  65          $img->Line($xt,$yzero,$xt,$yt);
  66          }
  67          $this->mark->Stroke($img,$xt,$yt);    
  68          $xt_old = $xt;
  69          $yt_old = $yt;
  70      }
  71      }
  72      
  73      // Framework function
  74      function Legend(&$aGraph) {
  75      if( $this->legend != "" ) {
  76          $aGraph->legend->Add($this->legend,$this->mark->fill_color);        
  77      }
  78      }    
  79      
  80  } // Class
  81  /* EOF */
  82  ?>