[R] R loop.

[David Winsemius]

On Apr 16, 2010, at 11:52 AM, Thomas Stewart wrote:

> I'm not sure I completely understand your question, but I think the  
> solution
> to your problem is the reshape function in the reshape package.

Except there is no reshape function in the reshape package. Your code  
works because the reshape function is in the stats package which is  
loaded by default.

>  Here is a
> silly example of how it would work:
>
>> V<-matrix(rbinom(15,4,.5),nrow=3)
>> X<-data.frame(A=c("A","B","C"),V=V)
>> X
>  A V.1 V.2 V.3 V.4 V.5
> 1 A   1   2   3   3   3
> 2 B   4   3   0   2   2
> 3 C   2   3   2   1   2
>> reshape(X,direction="long",varying=c("V.1","V.2","V.3","V.4","V.5"))
>    A time V id
> 1.1 A    1 1  1
> 2.1 B    1 4  2
> 3.1 C    1 2  3
> 1.2 A    2 2  1
> 2.2 B    2 3  2
> 3.2 C    2 3  3
> 1.3 A    3 3  1
> 2.3 B    3 0  2
> 3.3 C    3 2  3
> 1.4 A    4 3  1
> 2.4 B    4 2  2
> 3.4 C    4 1  3
> 1.5 A    5 3  1
> 2.5 B    5 2  2
> 3.5 C    5 2  3
>
> Your two columns of interest are A and V.  The time column lets you  
> know
> from which column the V came.
>
> -tgs
>
> On Fri, Apr 16, 2010 at 6:35 AM, mhalsham <mhalsham at bradford.ac.uk>  
> wrote:
>
>>
>> Hi every one I’m new to R and I cant figure our how to use the loop  
>> to do
>> the
>> following task, any help would be very kind of every one.
>> I have a file called (table3.txt) that contains over 1000 row and  
>> over 40
>> columns.
>> So for example first row would look like that
>>
>> Deafness,       EYA4,   DIAPH1, MYO7A,  TECTA,     COL11A2,      
>> POU4F3,
>> MYH9,   ACTG1,
>> MYO6
>>
>> I want the loop stamens to loop thro each row and take first cell  
>> which is
>> (Deafness and second which is EYA4) and but it on the button of the  
>> file
>> and
>> then take the first cell which is (Deafness again and the third  
>> cell which
>> is the DIAPH1) and put it on the button of the file. And so on till  
>> I end
>> up
>> with two columns one consists all the disease and one consist all the
>> genes.
>>
>> --
>> View this message in context:
>> http://n4.nabble.com/R-loop-tp1979620p1979620.html
>> Sent from the R help mailing list archive at Nabble.com.
>>
>> ______________________________________________
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>> PLEASE do read the posting guide
>> http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>>
>
> 	[[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at r-project.org mailing list
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> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.

David Winsemius, MD
West Hartford, CT