Elementwise comparison

Hi, I have a matrix that I would like to filter the row results using a different filter for each row without having to write a for statement. Take the following example.

z = [1 2 3;2 1 3];
y = [2;1];

I'd like to be able to say, count the values by row from z where each specific value is compared to the row value from y. I would expect the following to yield a 2x3 logical that I could perform my sum function on.

x = z .> y;
Would yield
x = logical([0 0 1;1 0 1]);
And
sum(x,2) = [1;2]

Thanks a lot, Brian

Answer 1

[Oleg Komarov]

There's no logical elementwise operator since they already require the array to match dimensions.

Thus, one way is to replicate y to the size of z and then compare. To avoid repmat, you can use directly:

bsxfun(@gt,z,y)

[Brian]

That's perfect. Thank you.