[R] pairwise comparisions

[Bert Gunter]

1. Be forewarned: There may be special approaches built into specific
packages that are better than "generalist" approaches like the one I
suggest here.

2. The general approach to this sort of thing is with ?outer, if I
understand you correctly.

3. Have you read an Introduction to R (ships with every copy of R)? If
not, stop and read it before posting further to this list, as it may
well contain answers to the questions you wish to pose here.

Cheers,
Bert

On Mon, Sep 10, 2012 at 7:00 AM, priya <jaggari_ash at yahoo.co.in> wrote:
> Hi ,
>  I am new to R . I am facing difficulty how to make pairwise comparisions.
> For example. I have a file which looks like below
>    a b c d
> x  3 6 7 6
> y  7 8 6 5
> z  5 4 7 8
> Here I need to look for the each pairwise comparisions (ab,ac,ad,bc,bd,cd
> for each row)
> For instance ,looking at first row, for x i need to look for ab values and
> take the min(3,6) >5 ,if its satistfies the count should be noted, (now
> count is 0), bc values ,min(6,7) >5 ,count for x =1 etc. Likewise all the
> comparisons are made and count is noted for x,y,z.
> Is there any function to make pairwise comparisions in R or any easy way to
> do this?
> Any help is greatly appreciated.
>
>
>
> --
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>
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-- 

Bert Gunter
Genentech Nonclinical Biostatistics

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