if statements

2011 12 6
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I have a set of data with 996 columns and 998 rows. Could I construct if statements so that each column returns 0 if all values are positive or all values are negative, and 1 if there is some combination of the two?

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the cyclist
the cyclist 2011-12-6

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A = rand(998,996); % Use your data in place of A
B = not(all(A>0) | all(A<0));

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bobby
bobby 2011-12-6
thank you so much, what if I wanted to differentiate the values that return one now, like return +1 if the very first value is positive and negative 1 if they first value is negative?

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