I have been searching for a good graph library for my application and finally i found "CorePlot"!. I had some difficulties in integrating CorePlot with my application. At last i found a way to integrate.These are the steps, hope it will be useful for you guys also.

You can download CorePlot from http://code.google.com/p/core-plot/downloads/detail?name=CorePlot_0.2.2.zip&can=2&q=

Unzip the file you have downloaded. You can see Source folder inside it.Open it.You have to create your project inside the examples folder.

Step 1:
Add CorePlot-CocoaTouch.xcodeproj from framework folder. You can find a lib under CorePlot-CocoaTouch.xcodeproj.

Step 2:
Drag the lib to "Link Binary With Library" under "Target".

Step 3:
Choose the "Target" and click info.Click the "General"  tab. To add direct dependency click the + button and choose the CorePlot-CocoaTouch.xcodeproj from the list.

Step 4:
Click the "Build"  tab under "Target". Search For "User Header Search Paths" and add "${PROJECT_DIR}/../../framework" and check the "Recursive".

Step 5:
Now Search for "Other Linker Flags".Add -ObjC and -all_load.

Step 6:
Add QuartzCore Framework and Build. Thats it. You have integrated CorePlot successfully!.