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
?>
运行效果如下图所示：
希望本文所述对大家的php程序设计有所帮助。
