Hi, 
I would like to generate a list of all subsequence of length k from an  array 
with length n (k < n). The result should be organized in a matrix.
So the matrix should look like the following whereas each row is one of a 
subsequence of len k.

[a[1:k],
 a[2:(k+1)]
 a[3:(k+2)]
 ...
 a[(n-k+1):n]

Is there away to do this with sapply method?

thanks,
Ron
                                          
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