本文實例講述了php使用Jpgraph繪制復雜X-Y坐標圖的方法。分享給大家供大家參考。具體實現方法如下：
<?php
include ("src/jpgraph.php");
include ("src/jpgraph_line.php");
$data1 = array(19,23,34,38,45,67,71,78,85,87,90,96); //第一條曲線的數組
$data2 = array(523,634,371,278,685,587,490,256,398,545,367,577); //第二條曲線的數組
$graph = new Graph(400,300); //創建新的Graph對象
$graph->SetScale("textlin");
$graph->SetY2Scale("lin");
$graph->SetShadow(); //設置圖像的陰影樣式
$graph->img->SetMargin(40,50,20,70); //設置圖像邊距
$graph->title->Set("年度收支表"); //設置圖像標題
$lineplot1=new LinePlot($data1); //創建設置兩條曲線對象
$lineplot2=new LinePlot($data2);
$graph->Add($lineplot1); //將曲線放置到圖像上
$graph->AddY2($lineplot2);
$graph->xaxis->title->Set("月份"); //設置坐標軸名稱
$graph->yaxis->title->Set("兆美元");
$graph->y2axis->title->Set("兆美元");
$graph->title->SetFont(FF_SIMSUN,FS_BOLD); //設置字體
$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"); //設置顏色
$lineplot2->SetColor("blue");
$lineplot1->SetLegend("Cost Amount"); //設置圖例名稱
$lineplot2->SetLegend("Revenue Amount");
$graph->legend->SetLayout(LEGEND_HOR); //設置圖例樣式和位置
$graph->legend->Pos(0.4,0.95,"center","bottom");
$graph->Stroke(); //輸出圖像
?>
運行效果如下圖所示：
希望本文所述對大家的php程序設計有所幫助。
