Hi all,

I have a matrix of type "MatrixXd", initialized by: MatrixXd a = MatrixXd::Random(5, 6);

Is there any functions in Eigen like "find" in matlab, that could output the corresponding entries: find(a > 0.5) in matlab or octave..

Or like numpy.where in python: import numpy as np
np.where(a > 0.5) ?

refer https://forum.kde.org/viewtopic.php?f=74&t=77068