On Jun 22, 2010, at 2:35 AM, Ron Shefi wrote:
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]
Is there away to do this with sapply method?
I suppose you could try (untested in absence of example):
sapply(1:(n-k+1), function(x) { a[x:(x+k)] })
--
David Winsemius, MD
West Hartford, CT
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