fine negative value entries in a matrix

Hello.. i am a Matlab beginner.. i have a question.. How to check if there's entry in a matrix is negative value.. i.e A = [1 -2 3;2 3 -4;3 4 5].. then i wanna do like this: if (any entry in A < 0); B = A*2; end.. tq

[the cyclist]

You might want to read some of this: http://www.mathworks.com/help/techdoc/learn_matlab/bqr_2pl.html

Answer 1

[the cyclist]

anyNegativeA = any(A(:)<0);

if anyNegativeA
    B = A*2;
end

[Nur Najiha]

tq... :)