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colselector
2003 Sep 30
2
subsetting a matrix
Hi,
I'm trying to take a set of rows and columns out of a matrix. I hve
been using the index aray approach. My overll matrix is X and is 179 x
65. I want to take out 4 columns and 161 rows.
Thus I made a 161 x 2 array I and filled it up with the row,col indices.
However doing,
X[ I ] gives me a vector of the extracted elements. Is there anyway I
can coerce this into a 161 x 4 matrix?