line/bar graph with respect to day,week,month and year iPhone

i wanna to make a bar/line graph showing progress of the body weight wrto day,week,month and year,all in a segmentd control. the body weight are shown as increment of 20 in X axis(20,40,60 etc.) and the y value should be 1,2,3 etc irrespective of the segmented control values. If the segmened control value is chosen as day, the y value will read as 1 day, 2 day etc. and if it is week,the y value would be 1 week, 2 week and so on.

for eg: if the weigh开发者_如何学运维t for the 1 day is 20, 2nd day is 30 and for 3rd day is 25, then the graph sould be as follows..(line graph also accepted)

Any help will be highly appreciated.

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Check CorePlot library it's quite decent and simple to use.
CorePlot plot examples

Other way is draw the bar manually, using CoreGraphics. Then you are just drawing CGRects with a proper height. It's more customizable but more coding too.

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Check this : http://iphoneapplicationdevelopers.blogspot.com/2011/03/iphone-sdk-how-to-draw-bar-charts-using.html

even U can find barchart sample program in core-plot folder ->examples ->CpTestApp .

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The best way to generate a bar graph i think is..

http://www.field-theory.org/articles/powerplot/example.html

or for all types of graph see..

http://www.keepedge.com/products/iphone_charting/