ianafast is an interface to 'anafast' F90 and 'anafast_cxx' C++ facilities. It requires some disk space on which to write the parameter file and the other temporary files. Most data can be provided/generated as an external FITS file, or as a memory array.
whitenoise = randomn(seed, nside2npix(256)) |
ianafast, whitenoise, cl, /ring, /silent |
plot, cl[*,0] |
will plot the power spectrum of a white noise map
Version 3.82, 2022-07-28