| Original Message (ID '289696') By yehuda: |
| So, why are you so specific about these values? what do you REALLY want to extract out of the matrix?
here is some synthetic matrix
mat = RandomInteger[10, {2, 5}];
(*now determine its dimensions, and set the number of rows to m, and number of columns to n *)
{m, n} = Dimensions[mat]
(* now it will extract the first two rows if there are two, or one, if there is only one row *)
(* it will extract the columns 3 to 6 if there are such rows, or the maximum available , starting from 3, if there is a 3'rd column, or the last column, if there are less *)
mat[[1 ;; Min[2, m], Min[3, n] ;; Min[6, n]]]
yehuda
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