<?php
  require_once ('jpgraph/jpgraph.php');
  require_once ('jpgraph/jpgraph_windrose.php');
  
  // Data can be specified using both ordinal index of the axis
  // as well as the direction label
  $data = array(
      0 => array(1,1,2.5,4),
      1 => array(3,4,1,4),
      3 => array(2,7,4,4,3),
      5 => array(2,7,1,2));
  
  // First create a new windrose graph with a title
  $graph = new WindroseGraph(400,400);
  
  // Setup title
  $graph->title->Set('Windrose example 2');
  $graph->title->SetFont(FF_VERDANA,FS_BOLD,12);
  $graph->title->SetColor('navy');
  
  // Create the windrose plot.
  $wp = new WindrosePlot($data);
  
  // Make it have 8 compass direction
  $wp->SetType(WINDROSE_TYPE8);
  
  // Setup the weight of the laegs for the different ranges
  $weights = array_fill(0,8,10);
  $wp->SetRangeWeights($weights);
  
  // Adjust the font and font color for scale labels
  $wp->scale->SetFont(FF_TIMES,FS_NORMAL,11);
  $wp->scale->SetFontColor('navy');
  
  // Set the diametr for the plot to 160 pixels
  $wp->SetSize(200);
  
  // Set the size of the innermost center circle to 30% of the plot size
  $wp->SetZCircleSize(0.2);
  
  // Adjust the font and font color for compass directions
  $wp->SetFont(FF_ARIAL,FS_NORMAL,12);
  $wp->SetFontColor('darkgreen');
  
  // Add and send back the graph to the client
  $graph->Add($wp);
  $graph->Stroke();
  ?>