Hi Hari,
Here is a suggestion:
with(x, aggregate(x[,-1], list(probename), median))
where x is your data set.
HTH,
Jorge
On Thu, Feb 25, 2010 at 4:25 PM, Harikrishnadhar <> wrote:
> Dear All,
>
> I am analyzing the miRNA data set in which I have 817 unique probes for
> each
> they have 20 features each . I have to group the similar features and take
> the median across them so that I have a data with no repeats to perform
> invariant analysis .
>
> My data looks something similar format
>
> probename sample1 sample2 sample3
> A 2.3 2.4 2.5
> A 8.9 3.6 7.9
> A 4.7 4.4 2.2
> C 2.2 2.1 2.3
> C 1.3 1.3 2.9
> B 2.2 2.1 2.7
> B 2.2 2.1 2.8
>
> I want to get some thing like after the means for similar probename are
> calculated
> A 2.3 2.4 2.5
> B 8.9 3.6 7.9
> C 2.2 2.1 2.8
> I have to group the probename elements and and get median across them.
> Please help with this so that I can get complete my analysis .
>
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> --
> Thanks
> Hari
> 215-385-4122
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> "If there is anyone out there who still doubts that America is a place
> where
> all things are possible"
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> --
> Thanks
> Hari
> 215-385-4122
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> "If there is anyone out there who still doubts that America is a place
> where
> all things are possible"
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