【发布时间】:2015-07-18 14:23:26
【问题描述】:
我已经开始使用 JPGraph 并尝试了以下简单的线图示例。我只添加了一个新变量 $xdata 来绘制 xy 图。但是,它没有绘制正确的图形(x 轴上的值显示为 1、2、3、4,因此,不代表 $xdata 中的值)。此外,y 值显示不正确。
如果我在没有 x 轴值的情况下进行绘图,则绘图工作正常,即 $p1 = new LinePlot($datay1);
<?php // content="text/plain; charset=utf-8"
require_once ('jpgraph/jpgraph.php');
require_once ('jpgraph/jpgraph_line.php');
$datay1 = array(20,15,23,15);
$datay2 = array(12,9,42,8);
$datax = array(0,10,20,30);
// Setup the graph
$graph = new Graph(300,250);
$graph->SetScale("textlin");
$theme_class=new UniversalTheme;
$graph->SetTheme($theme_class);
$graph->img->SetAntiAliasing(false);
$graph->title->Set('Filled Y-grid');
$graph->SetBox(false);
$graph->img->SetAntiAliasing();
$graph->yaxis->HideZeroLabel();
$graph->yaxis->HideLine(false);
$graph->yaxis->HideTicks(false,false);
$graph->xgrid->Show();
$graph->xgrid->SetLineStyle("solid");
$graph->xgrid->SetColor('#E3E3E3');
// Create the first line
$p1 = new LinePlot($datay1,$datax);
$graph->Add($p1);
$p1->SetColor("#6495ED");
$p1->SetLegend('Line 1');
// Create the second line
$p2 = new LinePlot($datay2,$datax);
$graph->Add($p2);
$p2->SetColor("#B22222");
$p2->SetLegend('Line 2');
$graph->legend->SetFrameWeight(1);
// Output line
$graph->Stroke();
?>
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