MATLAB: How to find largest magnitude in matrix

Question

2 1 7

3 4 2

11 -22 13

B = largest magnitude

B = -22

Answer 1

Try this:

B=[2 1 7
3 4 2
11 -22 13]
[maxB, index] = max(abs(B(:)))
maxB = maxB * sign(B(index))