Initialisation

Initialisation of a plan is done by one of the nfft_init-functions. The simplest version for the univariate case $d=1$ just specifies the number of Fourier coefficients $N_0$ and the number of non equispaced knots $M$. For an application-owned variable nfft_plan my_plan the function call is

nfft_init_1d(&my_plan,N0,M);

The first argument should be uninitialised. Memory allocation is completely done by the init routine.