本文实例讲述了php使用Jpgraph绘制复杂X-Y坐标图的方法。分享给大家供大家参考。具体实现方法如下：

<?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

?>