No idea what a "mean median histogram" is but you may wish to check
out ?tapply or library(plyr), both of which are designed for this
split-apply-combine paradigm.
Michael
On Tue, Mar 27, 2012 at 12:51 AM, arunkumar1111 <akpbond007 at gmail.com>
wrote:> Hi
>
> I have records like like this
>
> X1 ? ? ?X2 ? ? ?State
> 34 ? ? ?72 ? ? ?state1
> 9 ? ? ? 63 ? ? ?state1
> 49 ? ? ?31 ? ? ?state1
> 60 ? ? ?34 ? ? ?state1
> 80 ? ? ?73 ? ? ?state1
> 60 ? ? ?20 ? ? ?state2
> 59 ? ? ?87 ? ? ?state2
> 88 ? ? ?20 ? ? ?state2
> 71 ? ? ?66 ? ? ?state2
> 65 ? ? ?56 ? ? ?state2
> 59 ? ? ?16 ? ? ?state1
> 60 ? ? ?100 ? ? state2
>
>
> I want to get the summarize value like mean median histogram for X1 and X2
> based on state. I'm using FOR loop for this. ?Is there any method to
remove
> for loop and use apply or any alternatives
>
>
> -----
> Thanks in Advance
> ? ? ? ?Arun
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