array containing the input and output data. It can be of type
real(sp), real(dp), complex(spc) or complex(dpc). If it is of type real,
it is interpreted as an array of size(data)/2 complex variables.
backward
LGT
IN
Optional argument. If present and true, perform backward transformation, else forward
EXAMPLE:
use healpix_fft
call complex_fft (data, backward=.true.)
Performs a backward FFT on data.
RELATED ROUTINES
This section lists the routines related to complex_fft