Operations with rows First, second and third

I have a matriz

a = [0 1 1 0 0 1 0 1 0; 1 1 0 1 0 0 1 1 1; 0 0 0 1 1 1 0 0 1]

a = 3×9

0 1 1 0 0 1 0 1 0 1 1 0 1 0 0 1 1 1 0 0 0 1 1 1 0 0 1

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I want to know how many times happen, in the same position, zero in the First row and 1 in the second row. After that, the first row and third row.

And then, I want to know the same with second row and first e third row.

Finally, third row and first row and second row.

I don’t know Very of MATLAB.

Thanks!!!

Answer 1

[Matt J]

For example,

a = [0 1 1 0 0 1 0 1 0; 1 1 0 1 0 0 1 1 1; 0 0 0 1 1 1 0 0 1]

a = 3×9

0 1 1 0 0 1 0 1 0 1 1 0 1 0 0 1 1 1 0 0 0 1 1 1 0 0 1

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first_and_second = sum( ~a(1,:)&a(2,:))

first_and_second = 4