Navigation :

NFFTPrecompute

A - B - C - D - E - F - G - H - I - K - L - M - N - O - P - Q - R - S - T - U - V - W - X

Section Mesh::FFTs
Type integer
Default NFFT_PRE_PSI

NFFT precomputation strategy.

Options:

NFFT_PRE_LIN_PSI:
This method implements a linear interpolation from a lookup table.
NFFT_PRE_PSI:
This method uses a medium amount of memory to store d*(2*m+1)*M real numbers and requires at most 2(2m + 1)d extra multiplications for each node. This is the default option.
NFFT_PRE_FULL_PSI:
Is the fastest method but requires a large amount of memory as it requires to store (2*m+1)^d*M real numbers. No extra operations are needed during matrix vector multiplication.

Source information

Featured in testfiles