--- a/lib/pChart2.1.0/examples/example.drawDerivative.simple.php
+++ b/lib/pChart2.1.0/examples/example.drawDerivative.simple.php
@@ -1,1 +1,46 @@
-
+<?php   
+ /* CAT:Mathematical */
+
+ /* 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(3,12,15,8,5,-5,5,-5,-3,4,5,10),"Probe");
+ $MyData->setAxisName(0,"Temperatures");
+ $MyData->addPoints(array("Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"),"Labels");
+ $MyData->setSerieDescription("Labels","Months");
+ $MyData->setAbscissa("Labels");
+
+ /* Create the pChart object */
+ $myPicture = new pImage(700,230,$MyData);
+
+ /* Turn of AAliasing */
+ $myPicture->Antialias = FALSE;
+
+ /* Set the default font */ 
+ $myPicture->setFontProperties(array("R"=>0,"G"=>0,"B"=>0,"FontName"=>"../fonts/pf_arma_five.ttf","FontSize"=>6));
+
+ /* Define the chart area */
+ $myPicture->setGraphArea(50,40,680,170);
+
+ /* Draw the scale */
+ $scaleSettings = array("XMargin"=>10,"YMargin"=>10,"Floating"=>TRUE,"DrawSubTicks"=>TRUE,"GridR"=>100,"GridG"=>100,"GridB"=>100,"GridAlpha"=>15);
+ $myPicture->drawScale($scaleSettings);
+
+ /* Draw the chart */
+ $myPicture->Antialias = TRUE;
+ $myPicture->drawSplineChart();
+ $myPicture->Antialias = FALSE;
+
+ /* Draw the series derivative graph */
+ $myPicture->drawDerivative(array("Caption"=>FALSE));
+
+ /* Write the chart legend */
+ $myPicture->drawLegend(640,20,array("Style"=>LEGEND_NOBORDER,"Mode"=>LEGEND_HORIZONTAL));
+
+ /* Render the picture (choose the best way) */
+ $myPicture->autoOutput("pictures/example.drawDerivative.simple.png");
+?>