Question

要温柔..

使用下面的代码在RPI上使用pchart打印图表会导致在X轴上双重打印值。

我的首选结果是单个x轴值略微旋转，但无论我在下面的代码中更改它都不会给出好的结果。

帮助将不胜感激！

莫里斯

<?php

ini_set('display_errors', 'On');
error_reporting(E_ALL | E_STRICT);

include("class/pDraw.class.php");
include("class/pImage.class.php");
include("class/pData.class.php");

$db = new PDO("sqlite:/home/pi/sensor.db");

$MyData = new pData();  

$tijd=""; 
$lucht="";

$result = $db->query('SELECT tijd, lucht FROM waarden WHERE lucht  > 40');
foreach($result as $row)
{
  $tijd[]   = $row["tijd"];
  $lucht[] = $row["lucht"];
}

$MyData->addPoints($lucht,"lucht");
$MyData->setSerieOnAxis("lucht", 0);
$MyData->setAxisName(0,"lucht");
$MyData->setAxisUnit(0,"%");

$MyData->addPoints($tijd,"tijd");
$MyData->setSerieDescription("tijd","Tijden");
$MyData->setAbscissa("tijd");

$myPicture = new pImage(800,330,$MyData);
$myPicture->setFontProperties(array("FontName"=>"fonts/Forgotte.ttf","FontSize"=>11));
$myPicture->setGraphArea(60,40,740,290);
$myPicture->drawScale(array("AutoAxisLabels"=>FALSE,"RemoveXAxis"=>FALSE)); 
$myPicture->drawLineChart();

//rotate the xaxis values 
$myPicture->drawScale(array("DrawSubTicks"=>False, "LabelRotation"=>20));

$myPicture->autoOutput("mypic.png");
$db = null;
?>

enter image description here

Answer 1

发现我自己的错误。

似乎是我的双指令

$myPicture->drawScale(array("

在初始化时处理得太好并且导致双Xaxis标签

正确的代码：

<?php

ini_set('display_errors', 'On');
error_reporting(E_ALL | E_STRICT);

include("class/pDraw.class.php");
include("class/pImage.class.php");
include("class/pData.class.php");

$db = new PDO("sqlite:/home/pi/sensor.db");

$MyData = new pData();  

$tijd=""; 
$lucht="";

$result = $db->query('SELECT tijd, lucht FROM waarden WHERE lucht  > 40');
foreach($result as $row)
{
  $tijd[]   = $row["tijd"];
  $lucht[] = $row["lucht"];
}

$MyData->addPoints($lucht,"lucht");
$MyData->setSerieOnAxis("lucht", 0);
$MyData->setAxisName(0,"lucht");
$MyData->setAxisUnit(0,"%");

$MyData->addPoints($tijd,"tijd");
$MyData->setAbscissa("tijd");
$MyData->setAbscissaName("Time of Reading");

$myPicture = new pImage(800,330,$MyData);
$myPicture->setFontProperties(array("FontName"=>"fonts/Forgotte.ttf","FontSize"=>11));
$myPicture->setGraphArea(60,40,740,290);

//Remove line below to avoid double Xaxis values
//$myPicture->drawScale(array("AutoAxisLabels"=>FALSE,"RemoveXAxis"=>FALSE)); 
$myPicture->drawScale(array("DrawSubTicks"=>False, "LabelRotation"=>20));
$myPicture->drawLineChart();
$myPicture->autoOutput("mypic.png");
$db = null;
?>

Pchart在X轴上打印双倍值

1 个答案: