Question

我刚刚开始使用jpgraph和XAMPP我正在寻找制作一个条形图。当我在网上阅读一些文章时，它说你可以将一系列颜色传递给setfillcolor，这样每个条形都会有不同的颜色。但是，无论何时我传递颜色，图表都不会改变其浅蓝色的默认颜色。

图表响应数据的变化而不是颜色的变化。我尝试了一个累积的条形图示例，这似乎是颜色响应。

我不确定如何诊断这样的问题。求救！

下面的代码（Jpgraph文档示例，颜色从橙色变为＃B0C4DE [原始示例中的橙色未显示]）：

<?php // content="text/plain; charset=utf-8"
require_once(dirname(__FILE__)."\lib\jpgraph-3.5.0b1\src\jpgraph.php");
require_once(dirname(__FILE__)."\lib\jpgraph-3.5.0b1\src\jpgraph_line.php");
require_once(dirname(__FILE__)."\lib\jpgraph-3.5.0b1\src\jpgraph_bar.php");

$datay=array(2,3,5,25,15,6,3);
$datax=array('Jan','Feb','Mar','Apr','May','Jun','Jul');

// Size of graph
$width=400;
$height=500;

// Set the basic parameters of the graph
$graph = new Graph($width,$height,'auto');
$graph->SetScale('textlin');

// Rotate graph 90 degrees and set margin
$graph->Set90AndMargin(50,20,50,30);

// Nice shadow
$graph->SetShadow();

// Setup title
$graph->title->Set('Horizontal bar graph ex 1');
$graph->title->SetFont(FF_VERDANA,FS_BOLD,14);

// Setup X-axis
$graph->xaxis->SetTickLabels($datax);
$graph->xaxis->SetFont(FF_VERDANA,FS_NORMAL,12);

// Some extra margin looks nicer
$graph->xaxis->SetLabelMargin(10);

// Label align for X-axis
$graph->xaxis->SetLabelAlign('right','center');

// Add some grace to y-axis so the bars doesn't go
// all the way to the end of the plot area
$graph->yaxis->scale->SetGrace(20);

// We don't want to display Y-axis
$graph->yaxis->Hide();

// Now create a bar pot
$bplot = new BarPlot($datay);

$bplot->SetFillColor("#B0C4DE");
//  ALSO tried:
//  $bplot->SetColor(array("red","green","blue","gray"));
$bplot->SetShadow();

//You can change the width of the bars if you like
//$bplot->SetWidth(0.5);

// We want to display the value of each bar at the top
$bplot->value->Show();
$bplot->value->SetFont(FF_ARIAL,FS_BOLD,12);
$bplot->value->SetAlign('left','center');
$bplot->value->SetColor('black','darkred');
$bplot->value->SetFormat('%.1f mkr');

// Add the bar to the graph
$graph->Add($bplot);

// .. and stroke the graph
$graph->Stroke();
?>

Answer 1

我遇到了同样的问题，我找到的解决方案是在BarPlot类初始化之后定义格式

$bplot = new BarPlot($datay);
$graph->Add($bplot);
$bplot->value->Show();
$bplot->value->SetFont(FF_ARIAL,FS_BOLD,12);
$bplot->value->SetAlign('left','center');
$bplot->value->SetColor('black','darkred');
$bplot->value->SetFormat('%.1f mkr');

找到解决方案here

Answer 2

我有同样的问题，这是我的解决方案：只需添加“ClearTheme（）”，如下所示：

     $graph = new Graph(310,200); 
     $graph->ClearTheme();

Answer 3

这是由于Add()使用主题默认设置。有两种解决方案

在应用设置之前添加绘图
在$graph->graph_theme = null;之后移除主题$graph->SetScale()或调整主题

来源： /docs/chunkhtml/ch29.html - Part VII. Theme Class

我最近挖了这个，因为我的传奇也没有正确显示 JpGraph: How to control x/y offset, margins and color in v3.5.0b1 when using AccBarPlot?

Jpgraph不会改变我的条形图上的颜色

3 个答案: