checking that at least one value in a row of a matrix is greater than zero

I have a 2D matrix, T. I am interested in writing an "if" statement where the decision is made if at least one value in the bottom row of T (excluding the last m+1 columns) is less than zero. hoping someone could help me with the decision statement. thanks!!
For instance, when
T = [12 -4 1 3 10; 14 -6 1 2 1; 12 -4 1 3 10; 12 -4 1 3 14]
m = 2
the values 12 and -4 would be checked.

Asked:

on 5 Apr 2011

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