wecopttool.WEC.derivative_mat
- property WEC.derivative_mat: ndarray
Matrix to create Fourier coefficients of the derivative of some quantity.
For some array of Fourier coefficients
x
(excluding the sine component of the highest frequency), size(2*nfreq, ndof)
, the Fourier coefficients of the derivative ofx
are obtained viaderivative_mat @ x
.