Sure, that'll work fine, thanks.
But I guess I was looking for something more similar to MatLab, I'm  
really surprised R doesn't have a preset command for this (?)
Thanks again,
Stu

On 11 • Mar • 2009, at 5:49 PM, Sundar Dorai-Raj wrote:

>
> Does this help?
>
> A <- matrix(0, 6, 6)
> vec <- 1:5
> A[row(A) == col(A) + 1] <- vec
>
> --sundar
>
> On Wed, Mar 11, 2009 at 4:42 PM, Stu Field <sgf@colostate.edu> wrote:
>> I'm trying to enter a vector into the subdiagonal of a matrix but
>> cannot find a command in R which corresponds to the MatLab version of
>> diag(vec, k), where vec = the vector of interest, and k = the  
>> diagonal
>> (k=0 for the diagonal; k=-1 for the subdiagonal; k=1 for
>> superdiagonal, etc.)
>> Is there an equivalent command in R?
>>
>> I'm looking for something like this:
>> vec = seq(1, 5, 1)        # vector of interest
>>
>> A = xyz(vec,-1)           # creates a 6x6 matrix with vec on the
>> subdiagonal
>> where xyz is some function similar to diag, but with differing
>> arguments.
>>
>> I can't believe there is not a simple way to do this...
>> Thanks for your help,
>>
>> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> Stu Field, PhD
>> Postdoctoral Fellow
>> Department of Biology
>> Colorado State University
>> 1878 Campus Delivery
>> Fort Collins, CO 80523-1878
>> Office: E208 Anatomy/Zoology
>> Phone: (970) 491-5744
>> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>>
>>
>>
>>
>>
>>        [[alternative HTML version deleted]]
>>
>> ______________________________________________
>> R-help@r-project.org mailing list
>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>>

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Stu Field, PhD
Postdoctoral Fellow
Department of Biology
Colorado State University
1878 Campus Delivery
Fort Collins, CO 80523-1878
Office: E208 Anatomy/Zoology
Phone: (970) 491-5744
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~





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