php使用Jpgraph创建折线图效果示例

require_once 'jpgraph/src/jpgraph.php';
require_once 'jpgraph/src/jpgraph_line.php';

$data1 = array(89, 78, 99, 65, 92, 85, 85, 55, 64, 79, 85, 98);//设置统计数据
$data2 = array(68, 70, 69, 80, 50, 60, 75, 65, 75, 65, 80, 89);//设置统计数据

$graph = new Graph(600, 300);//创建统计图对象
$graph->SetScale('textlin');//设置刻度样式
$graph->SetY2Scale('lin');
$graph->SetShadow();//设置背景带阴影
$graph->img->SetMargin(40, 50, 20, 70);// 设置图表灰度四周边距，顺序为左右上下
$graph->title->Set(iconv('utf-8', 'GB2312//IGNORE', '图书销售走势表'));//设置走势图的标题

$lineplot1 = new LinePlot($data1);//建立LinePlot对象
$lineplot2 = new LinePlot($data2);//建立LinePlot对象
$graph->Add($lineplot1);
$graph->AddY2($lineplot2);

$graph->xaxis->title->Set(iconv('utf-8', 'GB2312//IGNORE', "月份"));//设置x轴的标题
$graph->yaxis->title->Set(iconv('utf-8', 'GB2312//IGNORE', "book A 销售金额（万元）"));//设置y轴的标题
$graph->y2axis->title->Set(iconv('utf-8', 'GB2312//IGNORE', "book B 销售金额（万元）"));//设置y轴的标题
$graph->y2axis->title->SetMargin(20);//设置右边的title到图的距离
$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('book A');//绑定
$lineplot2->SetLegend('book B');
$graph->legend->SetLayout(LEGEND_HOR);
$graph->legend->Pos(0.4, 0.95, 'center', 'bottom');
//图例文字框的位置 0.4，0.95 是以右上角为基准的，0.4是距左右距离，0.95是上下距离。
$graph->Stroke();//输出