Replacing all negative elements with zero eigen3 c++

Question

As said I want to replace all < 0 elements in a eigen3 matrix in C++ with zero in most efficient manner.

I check that there are negative elements using:

(result.array() < 0).any()

Answer 1

A nicer and more efficient way than your proposed method would be to use the select method.

result = (result.array() < 0).select(0, result);