[英]JPGraph error, A plot has an illegal scale
我正在尝试使用JPGragph制作图形,但我不断收到错误消息:
JpGraph Error A plot has an illegal scale. This could for example be that you are trying to use text auto scaling to draw a line plot with only one point or that the plot area is too small. It could also be that no input data value is numeric (perhaps only '-' or 'x')
$ydata = round($ydata[0]); // An attempt to convert float to int
$ydata = (int)$ydata; // That didn't bring any solution(thought it couldn't handle float)
$pt = new LinePlot($ydata); // Here is where the error is thrown
$bar2->Add($pt);
$pt->SetColor("blue");
$pt->SetWeight(10);
我试图用整数替换$ ydata,但这只会引发致命错误。
没有舍入和类型转换,这是$ ydata的var_dump:
array(1) { [0]=> float(8.1102970953135) }
当绘图仅包含一个数据点时,使用PHP 7.2时遇到了同样的问题。 原因似乎是JPGraph试图将单个数据点同时放在图的左边缘和右边缘。
使用$plot->SetCenter();
为我解决了这个问题,对于BoxPlots来说看起来更好。
使用PHP 7? 我遇到了同样的错误,发现了这一点:
http://jpgraph.net/doc/faq.php#F4-13
他们说您的PHP安装“有问题”。
帮助我的是在数据数组中添加了第二个值-只有一个值不起作用。
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