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

drawStackedAreaChart($Format="");

Where :




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


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 :

 /* pChart library inclusions */
 include("../class/pData.class.php");
 include("../class/pDraw.class.php");
 include("../class/pImage.class.php");

 /* Create and populate the pData object */
 $MyData = new pData();  
 $MyData->addPoints(array(1,-2,-1,2,1,0),"Probe 1");
 $MyData->addPoints(array(1,-2,-3,2,1,8),"Probe 2");
 $MyData->addPoints(array(2,4,2,0,4,2),"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 pChart object */
 $myPicture = new pImage(700,230,$MyData);

 /* Draw the background */
 $Settings = array("R"=>170, "G"=>183, "B"=>87, "Dash"=>1, "DashR"=>190, "DashG"=>203, "DashB"=>107);
 $myPicture->drawFilledRectangle(0,0,700,230,$Settings);

 /* Overlay with a gradient */
 $Settings = array("StartR"=>219, "StartG"=>231, "StartB"=>139, "EndR"=>1, "EndG"=>138, "EndB"=>68, "Alpha"=>50);
 $myPicture->drawGradientArea(0,0,700,230,DIRECTION_VERTICAL,$Settings);
 $myPicture->drawGradientArea(0,0,700,20,DIRECTION_VERTICAL,array("StartR"=>0,"StartG"=>0,"StartB"=>0,"EndR"=>50,"EndG"=>50,"EndB"=>50,"Alpha"=>80));

 /* Add a border to the picture */
 $myPicture->drawRectangle(0,0,699,229,array("R"=>0,"G"=>0,"B"=>0));
 
 /* Write the picture title */ 
 $myPicture->setFontProperties(array("FontName"=>"../fonts/Silkscreen.ttf","FontSize"=>6));
 $myPicture->drawText(10,13,"drawStackedAreaChart() - draw a stacked area chart",array("R"=>255,"G"=>255,"B"=>255));

 /* Write the chart title */ 
 $myPicture->setFontProperties(array("FontName"=>"../fonts/Forgotte.ttf","FontSize"=>11));
 $myPicture->drawText(250,55,"Average temperature",array("FontSize"=>20,"Align"=>TEXT_ALIGN_BOTTOMMIDDLE));

 /* Draw the scale and 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,"Mode"=>SCALE_MODE_ADDALL));
 $myPicture->setFontProperties(array("FontName"=>"../fonts/pf_arma_five.ttf","FontSize"=>6));
 $myPicture->setShadow(FALSE);
 $myPicture->drawStackedAreaChart(array("DisplayValues"=>TRUE,"DisplayColor"=>DISPLAY_AUTO,"Surrounding"=>20));

 /* Draw the scale and 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,"Mode"=>SCALE_MODE_ADDALL,"DrawSubTicks"=>TRUE));
 $myPicture->setShadow(FALSE);
 $myPicture->drawStackedAreaChart(array("Surrounding"=>10));

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

 /* Render the picture (choose the best way) */
 $myPicture->autoOutput("pictures/example.drawStackedAreaChart.png");

 /* pChart library inclusions */
 include("../class/pData.class.php");
 include("../class/pDraw.class&.phpquot;);
 include("../class/pImage.class&.phpquot;);

 /* Create and populate the pData object */
 $MyData = new pData();  
 $MyData->addPoints(array(4,0,0,12,8,3,0,12,8),"Frontend #1");
 $MyData->addPoints(array(3,12,15,8,5,5,12,15,8),"Frontend #2");
 $MyData->addPoints(array(2,7,5,18,19,22,7,5,18),"Frontend #3");
 $MyData->setAxisName(0,"Average Usage");
 $MyData->addPoints(array("Jan","Feb","Mar","Apr","May","Jun","Jui","Aug","Sep"),"Labels");
 $MyData->setSerieDescription("Labels","Months");
 $MyData->setAbscissa("Labels");

 /* Normalize the data series to 100% */
 $MyData->normalize(100,"%");

 /* Create the pChart object */
 $myPicture = new pImage(700,230,$MyData);
 $myPicture->drawGradientArea(0,0,700,230,DIRECTION_VERTICAL,array("StartR"=>240,"StartG"=>240,"StartB"=>240,"EndR"=>180,"EndG"=>180,"EndB"=>180,"Alpha"=>100));
 $myPicture->drawGradientArea(0,0,700,230,DIRECTION_HORIZONTAL,array("StartR"=>240,"StartG"=>240,"StartB"=>240,"EndR"=>180,"EndG"=>180,"EndB"=>180,"Alpha"=>20));

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

 /* Draw the scale and the chart */ 
 $myPicture->setGraphArea(60,20,680,190);
 $myPicture->drawScale(array("XMargin"=>2,"DrawSubTicks"=>TRUE,"Mode"=>SCALE_MODE_ADDALL));
 $myPicture->setShadow(TRUE,array("X"=>1,"Y"=>1,"R"=>0,"G"=>0,"B"=>0,"Alpha"=>10));
 $myPicture->drawStackedAreaChart(array("Surrounding"=>60));
 $myPicture->setShadow(FALSE);

 /* Write the chart legend */ 
 $myPicture->drawLegend(480,210,array("Style"=>LEGEND_NOBORDER,"Mode"=>LEGEND_HORIZONTAL));

 /* Render the picture (choose the best way) */
 $myPicture->autoOutput("pictures/example.drawStackedAreaChart.normalized.png");