fft_nrfft5 - return mixed radix 2,3,5 size
SYNOPSIS
#include <fft.h> (fixed-format sources)
#include <f90fft.h> (free-format sources)
integer function fft_nrfft5(n)
-
integer n
DESCRIPTION
The function, "fft_nrfft5", is provided for determining an
appropriate radix 2,3,5 value to pad out to for the FFT's. Given the
integer input, "n", the function returns the integer M
such that M is the smallest number greater than or equal to
"n" such that M = 2**i * 3**j * 5**k where i is
a positive integer and j & k are non-negative
integers.
AUTHOR
Phuong Vu, HPC
Jerry Ehlers, EPTG