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complex_fft
This routine performs a forward or backward Fast Fourier Transformation
on its argument data.
Location in HEALPix directory tree:
src/f90/mod/healpix_fft.F90
FORMAT call complex_fft(
data, backward
)
ARGUMENTS
| name&dimensionality |
kind |
in/out |
description |
|---|
| |
|
|
|
|
data(:) |
XXX |
INOUT |
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 ROUTINESThis section lists the routines related to complex_fft
-
real_fft
- routine for FFT of real data
Eric Hivon
2010-06-18
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