Hi there,

I just start to use Eigen in C++.
I am trying to do an element-wise product of two arrays, as followings

ArrayXd p(M), p1(N), p2(N);
for (int i=0; i < N_tau; i++) {
p.segment(0, M-1) = p1.segment(0, M-1)*p2.segment(i, M-1+i);
}

Provided all p, p1 and p2 are well initialized with nonzero values.
Also N is much greater than M+N_tau...

It returns me the error:
Assertion failed: (aLhs.rows() == aRhs.rows() && aLhs.cols() == aRhs.cols()), function CwiseBinaryOp, file /usr/local/include/Eigen/src/Core/CwiseBinaryOp.h, line 132.

What is the best way to do the product?

In Matlab it would be just like
for i = 1: N_tau
p = p1(1:M).*p2(i:M-1+i)
end

Thanks in advance!
Best regards

The arguments of segment are 1) starting position, and 2) the length of the segment, and not the index of the last element.