Can any one help me in drawing a bar graph...?

In my application I have to read data from a file or core data and draw a bar graph using that data. Can any one help me in d开发者_运维技巧rawing the bar graph in a simple way?

I have used the Core Plot library successfully. Here are some basic tutorials, but you will have to adjust to suit your particular scenario:

Using Core Plot in an iPhone Application

High Level Design Overview

Visualizing Data with Core Plot

check out this: http://code.google.com/p/core-plot/