How to draw a nice bar graph on iOS (iPad)

I want to draw a good looking bar graph and thought Core plot could come to the rescue, but the bar graphs in the examples look like they were drawn in MSPaint...

I want each bar to have two colors, split in the middle vertically.

Is this possibl开发者_开发问答e to do in Core plot or are there better suited libraries?

I've previously used libraries like MS Chart Controls (ASP.NET): http://archive.msdn.microsoft.com/mschart where they have great bar chart controls...

Google Chart Tools http://code.google.com/apis/chart/