jpgraph柱状图的使用方法详解

//加载生成图表对应的文件
require_once ('jpgraph/jpgraph.php');
require_once ('jpgraph/jpgraph_bar.php');

//创建图表的数据，可以自定义
$data1y=array(-8,8,9,3,5,6);
$data2y=array(18,2,1,7,5,4);

// 图表的长宽
$graph = new Graph(500,400);
$graph->SetScale("textlin");
$graph->SetShadow();

//图表的外边距
$graph->img->SetMargin(40,30,20,40);
// Create the bar plots
$b1plot = new BarPlot($data1y);
$b1plot->SetFillColor("orange");
$b1plot->value->Show();
$b2plot = new BarPlot($data2y);
$b2plot->SetFillColor("blue");
$b2plot->value->Show();
// Create the grouped bar plot
$gbplot = new AccBarPlot(array($b1plot,$b2plot));
// ...and add it to the graPH
$graph->Add($gbplot);

//设置图表的标题字体、大小
$graph->title->Set("Accumulated bar plots");
$graph->xaxis->title->Set("X-title");
$graph->yaxis->title->Set("Y-title");

//和上面标题对应，设置标题的字体和大小
$graph->title->SetFont(FF_FONT1,FS_BOLD);
$graph->yaxis->title->SetFont(FF_FONT1,FS_BOLD);
$graph->xaxis->title->SetFont(FF_FONT1,FS_BOLD);

//生成本地图表，?认留空，生成在当前目录，可以Stroke(“路径/文件名.png”)这样指定路径
$graph->Stroke();