It is perfectly possible to combine the previous bar types to have grouped accumulated bar plots. This is done by just adding the different accumulated plots to a group bar plot, for example the following code would do that.


  
// Create all the 4 bar plots

$b1plot 
= new BarPlot($data1y);

$b1plot->SetFillColor(
"orange");

$b2plot 
= new BarPlot($data2y);

$b2plot->SetFillColor(
"blue");

$b3plot 
= new BarPlot($data3y);

$b3plot->SetFillColor(
"green");

$b4plot 
= new BarPlot($data4y);

$b4plot->SetFillColor(
"brown");



// Create the accumulated bar plots

$ab1plot 
= new AccBarPlot
(array($b1plot
,$b2plot));

$ab2plot 
= new AccBarPlot
(array($b3plot
,$b4plot));



// Create the grouped bar plot

$gbplot 
= new GroupBarPlot
(array($ab1plot
,$ab2plot));



// ...and add it to the graph

$graph->Add(
$gbplot);

8.2.7 Using grouped accumulated bar graphs