How to reduce the Plot Area of a BarGraph?

[MasterJ]

Hello All,

I need to display only two or three bars in a bar graph.
By Default these bars are centered with in the available space.
I'm aligning these bars to the left and the space between them is set to the minimum.
So, there is a lot of space in the plot drawing area which I need to eliminate. I want ot cut the bar plot rendering Area after the last bar but , this is not what is achieved with setUpperMargin Method of CategoryAxis.
I need to cut the remaining area ine plot after the last bar, not push the last bar to tnhe right as the setUpperMargin Does. I want ot keep the reamining part of the chart the same width as it accounts for Clarity of the image. I need the reaming plot rendering area to clipped off.

Is there any way?
Thanking you for your response.,
MJ