Eigen boolean array slicing
c++, eigen, matlab, matrix, slice
Solution
As pointed out in the answer to an similar question here: Submatrices and indices using Eigen, libigl adds this functionality to Eigen.
igl::slice(A,indices,B);
Is equivalent to
B = A(indices)
Problem
In MATLAB it is common to slice out values that satisfy some condition from a matrix/array (called logical indexing). ``` vec = [1 2 3 4 5]; condition = vec > 3; vec(condition) = 3; ``` How do I do this in Eigen? So far I have: ``` Eigen::Matrix<bool, 1, 5> condition = vec.array() > 3; ```