php使用Jpgraph绘制复杂X-Y坐标图的方法

<?php 
include ("src/jpgraph.php"); 
include ("src/jpgraph_line.php"); 
$data1 = array(19,23,34,38,45,67,71,78,85,87,90,96); //第一条曲线的数组 
$data2 = array(523,634,371,278,685,587,490,256,398,545,367,577); //第二条曲线的数组 
$graph = new graph(400,300); //创建新的graph对象 
$graph->setscale("textlin"); 
$graph->sety2scale("lin"); 
$graph->setshadow(); //设置图像的阴影样式 
$graph->img->setmargin(40,50,20,70); //设置图像边距 
$graph->title->set("年度收支表"); //设置图像标题 
$lineplot1=new lineplot($data1); //创建设置两条曲线对象 
$lineplot2=new lineplot($data2); 
$graph->add($lineplot1); //将曲线放置到图像上 
$graph->addy2($lineplot2); 
$graph->xaxis->title->set("月份"); //设置坐标轴名称 
$graph->yaxis->title->set("兆美元"); 
$graph->y2axis->title->set("兆美元"); 
$graph->title->setfont(ff_simsun,fs_bold); //设置字体 
$graph->yaxis->title->setfont(ff_simsun,fs_bold); 
$graph->y2axis->title->setfont(ff_simsun,fs_bold); 
$graph->xaxis->title->setfont(ff_simsun,fs_bold); 
$lineplot1->setcolor("red"); //设置颜色 
$lineplot2->setcolor("blue"); 
$lineplot1->setlegend("cost amount"); //设置图例名称 
$lineplot2->setlegend("revenue amount"); 
$graph->legend->setlayout(legend_hor); //设置图例样式和位置 
$graph->legend->pos(0.4,0.95,"center","bottom"); 
$graph->stroke(); //输出图像 
?>