phplot生成图片类用法详解(2)

# PHPlot Demo  
# 2008-01-09 ljb  
# For more information see    
 
# Load the PHPlot class library:  
require_once 'phplot.php';  
 
# Define the data array: Label, the 3 data sets.  
# Year,  Features, Bugs, Happy Users:  
$data = array(  
  array('2001',  60,  35,  20),  
  array('2002',  65,  30,  30),  
  array('2003',  70,  25,  40),  
  array('2004',  72,  20,  60),  
  array('2005',  75,  15,  70),  
  array('2006',  77,  10,  80),  
  array('2007',  80,   5,  90),  
);  
 
# Create a PHPlot object which will make a 600x400 pixel image:  
$p = new PHPlot(600, 400);  
 
# Use TrueType fonts:  
$p->SetDefaultTTFont('./arial.ttf');  
 
# Set the main plot title:  
$p->SetTitle('PHPlot Customer Satisfaction (estimated)');  
 
# Select the data array representation and store the data:  
$p->SetDataType('text-data');  
$p->SetDataValues($data);  
 
# Select the plot type - bar chart:  
$p->SetPlotType('bars');  
 
# Define the data range. PHPlot can do this automatically, but not as well. 
$p->SetPlotAreaWorld(0, 0, 7, 100);  
 
# Select an overall image background color and another color under the plot:  
$p->SetBackgroundColor('#ffffcc');  
$p->SetDrawPlotAreaBackground(True);  
$p->SetPlotBgColor('#ffffff');  
 
# Draw lines on all 4 sides of the plot:  
$p->SetPlotBorderType('full');  
 
# Set a 3 line legend, and position it in the upper left corner:  
$p->SetLegend(array('Features', 'Bugs', 'Happy Users'));  
$p->SetLegendWorld(0.1, 95);  
# Turn data labels on, and all ticks and tick labels off:  
$p->SetXDataLabelPos('plotdown');  
$p->SetXTickPos('none');  
$p->SetXTickLabelPos('none');  
$p->SetYTickPos('none');  
$p->SetYTickLabelPos('none');  
 
# Generate and output the graph now:  
$p->DrawGraph();