add non zeros in array to my probability formular

Imagine I have probabilities in this array:

a = [ 0.4  0  0 ; 0.6 0.5 0.8 ; 0 0.3 0.3 ];

then I want to add all non-zeros to this formula:

end_probability = 1 - (1 - a(1,1));
end_probability = 1 - ((1 - a(2,1)) * (1 - a(2,2)) * (1 - a(2,3)));
end_probability = 1 - ((1 - a(3,2)) * (1 - a(3,3)));

Any idea of how to make some clean code out of this and put the result into a vector? a can be larger in rows and columns...

Answer 1

[Bruno Luong]

ep =  1 - prod(1-a,2)

[Martin]

wow I was working with if and stuff.. Very elegant, thanks!