This function allows you to draw an area chart. All the drawing parameters are given trough a $Format array. To learn more about this please read the Format array guide.

drawAreaChart($Format="");

Where :




It is possible to customize the area chart rendering by playing with this array. Providing a detailled configuration is not mandatory.



Thresholds can be used to draw with different colors some part of your charts. Thresholds are defined through an array :

 $Threshold = "";
 $Threshold[] = array("Min"=>0,"Max"=>5,"R"=>207,"G"=>240,"B"=>20,"Alpha"=>70);
 $Threshold[] = array("Min"=>5,"Max"=>10,"R"=>240,"G"=>232,"B"=>20,"Alpha"=>70);
 $Threshold[] = array("Min"=>10,"Max"=>20,"R"=>240,"G"=>191,"B"=>20,"Alpha"=>70);

You can define if the labels color will be the same than the serie color of if you want to force it manually setting DisplayColor to :

 /* Build a dataset */
 $MyData = new pData();  
 $MyData->addPoints(array(-4,VOID,VOID,12,8,3),"Probe 1");
 $MyData->addPoints(array(3,12,15,8,5,-5),"Probe 2");
 $MyData->addPoints(array(2,7,5,18,19,22),"Probe 3");
 $MyData->setSerieTicks("Probe 2",4);
 $MyData->setAxisName(0,"Temperatures");
 $MyData->addPoints(array("Jan","Feb","Mar","Apr","May","Jun"),"Labels");
 $MyData->setSerieDescription("Labels","Months");
 $MyData->setAbscissa("Labels");

 /* Create the 1st chart*/
 $myPicture->setGraphArea(60,60,450,190);
 $myPicture->drawFilledRectangle(60,60,450,190,array("R"=>255,"G"=>255,"B"=>255,"Surrounding"=>-200,"Alpha"=>10));
 $myPicture->drawScale(array("DrawSubTicks"=>TRUE));
 $myPicture->setShadow(TRUE,array("X"=>1,"Y"=>1,"R"=>0,"G"=>0,"B"=>0,"Alpha"=>10));
 $myPicture->setFontProperties(array("FontName"=>"fonts/pf_arma_five.ttf","FontSize"=>6));
 $myPicture->drawAreaChart(array("DisplayValues"=>TRUE,"DisplayColor"=>DISPLAY_AUTO));
 $myPicture->setShadow(FALSE);

 /* Create the 2nd chart */
 $myPicture->setGraphArea(500,60,670,190);
 $myPicture->drawFilledRectangle(500,60,670,190,array("R"=>255,"G"=>255,"B"=>255,"Surrounding"=>-200,"Alpha"=>10));
 $myPicture->drawScale(array("Pos"=>SCALE_POS_TOPBOTTOM,"DrawSubTicks"=>TRUE));
 $myPicture->setShadow(TRUE,array("X"=>1,"Y"=>1,"R"=>0,"G"=>0,"B"=>0,"Alpha"=>10));
 $myPicture->drawAreaChart();
 $myPicture->setShadow(FALSE);

 /* Write the legend*/
 $myPicture->drawLegend(510,205,array("Style"=>LEGEND_NOBORDER,"Mode"=>LEGEND_HORIZONTAL));

 /* Create and populate the pData object */ 
 $MyData = new pData();   
 for($i=0;$i<=30;$i++) { $MyData->addPoints(rand(1,15),"Probe 1"); } 
 $MyData->setSerieTicks("Probe 2",4); 
 $MyData->setAxisName(0,"Temperatures"); 

 /* Create the pChart object */ 
 $myPicture = new pImage(700,230,$MyData); 

 /* Turn of Antialiasing */ 
 $myPicture->Antialias = FALSE; 

 /* Add a border to the picture */ 
 $myPicture->drawRectangle(0,0,699,229,array("R"=>0,"G"=>0,"B"=>0)); 
  
 /* Write the chart title */  
 $myPicture->setFontProperties(array("FontName"=>"../fonts/Forgotte.ttf","FontSize"=>11)); 
 $myPicture->drawText(150,35,"Average temperature",array("FontSize"=>20,"Align"=>TEXT_ALIGN_BOTTOMMIDDLE)); 

 /* Set the default font */ 
 $myPicture->setFontProperties(array("FontName"=>"../fonts/pf_arma_five.ttf","FontSize"=>6)); 

 /* Define the chart area */ 
 $myPicture->setGraphArea(60,40,650,200); 

 /* Draw the scale */ 
 $scaleSettings = array("XMargin"=>10,"YMargin"=>10,"Floating"=>TRUE,"GridR"=>200,"GridG"=>200,"GridB"=>200, "DrawSubTicks"=>TRUE,"CycleBackground"=>TRUE); 
 $myPicture->drawScale($scaleSettings); 

 /* Write the chart legend */ 
 $myPicture->drawLegend(600,20,array("Style"=>LEGEND_NOBORDER,"Mode"=>LEGEND_HORIZONTAL)); 

 /* Turn on Antialiasing */ 
 $myPicture->Antialias = TRUE; 

 /* Enable shadow computing */ 
 $myPicture->setShadow(TRUE,array("X"=>1,"Y"=>1,"R"=>0,"G"=>0,"B"=>0,"Alpha"=>10)); 

 /* Draw the area chart */ 
 $Threshold = ""; 
 $Threshold[] = array("Min"=>0,"Max"=>5,"R"=>207,"G"=>240,"B"=>20,"Alpha"=>70); 
 $Threshold[] = array("Min"=>5,"Max"=>10,"R"=>240,"G"=>232,"B"=>20,"Alpha"=>70); 
 $Threshold[] = array("Min"=>10,"Max"=>20,"R"=>240,"G"=>191,"B"=>20,"Alpha"=>70); 
 $myPicture->drawAreaChart(array("Threshold"=>$Threshold)); 

 /* Write the thresholds */ 
 $myPicture->drawThreshold(5,array("WriteCaption"=>TRUE,"Caption"=>"Warn Zone","Alpha"=>70,"Ticks"=>2,"R"=>0,"G"=>0,"B"=>255)); 
 $myPicture->drawThreshold(10,array("WriteCaption"=>TRUE,"Caption"=>"Error Zone","Alpha"=>70,"Ticks"=>2,"R"=>0,"G"=>0,"B"=>255)); 
   
 /* Render the picture (choose the best way) */ 
 $myPicture->autoOutput("pictures/example.drawAreaChart.threshold.png");