I am trying to perform an element-wise multiplication of a row vector with matrix. In MATLAB this would be simply done by the "dot" operator or:

data_deriv = 1i * k .* fk;

where k is row vector and fk is a matrix.
Now in C++ I have this code:

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Matrix <double, 1, nx> eKX;
eKX.setZero();
for(int i = 0; i < nx; i++){
eKX[i] = //some expression
}
for (int i = 0; i < nx; i++){
for (int j = 0; j < ny+1; j++){
for (int k = 0; k < ncomp; k++){
uhkOutX[i*(ny+1)+j][k] = //FFT of some expression
}
}
}
Eigen::Map<Eigen::MatrixXcd, Eigen::Unaligned> euhX(reinterpret_cast<std::complex<double>*>(uhkOutX),(ny+1),nx); //(nyk),nx);

Now, I am trying to take the product of eKX which is a row vector of 1 x 10 and the matrix euhX of a 11 x 10. I tried few things, none of which seem to work really: