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
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