[R] RE-Row-wise two sample T-test on subsets of a matrix

[Nameeta Lobo]

whoops. forgot to mention the apply command.

so this is what I exactly typed in
fun5<-function(m){as.numeric(t.test(m[1:11],m[12:22])[[1]])}
abc<-apply(temp.matrix,1,fun5)


temp.matrix or course being my 196002*22 matrix

and then I got the t-test rowwise for my two groups.


It's just that previously I had the extra commas in my
function. Post doc in lab helped me. Syntax always worries me.

nameeta



---- Original message ----
>Date: Fri, 2 Mar 2007 11:28:26 -0500
>From: "Leeds, Mark (IED)" <Mark.Leeds at morganstanley.com>  
>Subject: RE: [R] RE-Row-wise two sample T-test on subsets of
a matrix  
>To: "Nameeta Lobo" <nlobo at uchicago.edu>
>
>wow, so it didn't even need a call to apply. t.test must be
vectorized.
>interesting.
>
> 
>
>
>-----Original Message-----
>From: r-help-bounces at stat.math.ethz.ch
>[mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of
Nameeta Lobo
>Sent: Friday, March 02, 2007 11:09 AM
>To: r-help at stat.math.ethz.ch
>Subject: [R] RE-Row-wise two sample T-test on subsets of a matrix
>
>hello all
>
>thanks a lot for the info, I just actually needed to remove
that comma
>in my command line
>
>what i had typed in was
>t.test(temp.matrix[,1:11],temp.matrix[,12:22],paired=TRUE)
>what i needed to do was
>t.test(temp.matrix[1:11],temp.matrix[12:22],paired=TRUE)
>
>thanks Petr, saw your comment later.
>
>nameeta
>
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