4-1 绘制XYY坐标图

<?php //引入类库 require_once "/data/webroot/resource/php/src/jpgraph.php"; require_once "/data/webroot/resource/php/src/jpgraph_line.php"; $data=array(0=>-21,1=>-3,2=>12,3=>19,4=>23,5=>29,6=>30,7=>22,8=>26,9=>18,10=>5,11=>-10);//第一条数据 $data2y=array(0=>3,1=>12,2=>18,3=>30,4=>28,5=>33,6=>43,7=>39,8=>36,9=>29,10=>15,11=>10);//第二条数据 //得到Graph对象 $graph=new Graph(400,400); //设置X和Y轴样式及Y轴的最大值最小值 $graph->SetScale("textint",-30,50); //设置右侧Y轴样式及其最大值最小值 $graph->SetY2Scale("int",-30,50); //设置图像样式，加入阴影 $graph->SetShadow(); //设置图像边界范围 $graph->img->setMargin(40,30,50,70); //设置标题 $graph->title->Set("this is a test X-Y-Y"); //得到曲线实例 $linePlot=new LinePlot($data); //得到第二条曲线 $linePlot2y=new LinePlot($data2y); //将曲线加入到图像中 $graph->Add($linePlot); $graph->Add($linePlot2y); //设置三个坐标轴名称 $graph->xaxis->title->Set("Month"); $graph->yaxis->title->Set("beijing"); $graph->y2axis->title->Set("ShangHai"); //设置两条曲线的颜色 //设置两条曲线的图例 $linePlot->SetLegend("Beijing"); $linePlot2y->SetLegend("Shanghai"); //设置图例样式 $graph->legend->setlayout(LEGEND_HOR); $graph->legend->Pos(0.45,0.9,"center","bottom"); //将图像输出到浏览器 $graph->Stroke();