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: http://xmm.vilspa.esa.es/sas/7.0.0/doc/ssclib/node122.html
Дата изменения: Wed Jun 28 23:12:28 2006 Дата индексирования: Sat Dec 22 09:33:15 2007 Кодировка: Поисковые слова: guide 8.0 |
Module name: fftw_aux
Author: Ian Stewart (University of Leicester, ims@star.le.ac.uk)
This module is meant to be used in conjunction with the Fast Fourier Transform package fftw which comes with the sas. The module contains a header in which some useful variables are declared, as well as the following routine:
function findNextHighest2357multiple(i) result(result) integer, intent(in) :: i end function findNextHighest2357multiple
This function is designed to look for the smallest integer that satisfies the following conditions: (i) it is greater than or equal to the argument i; (ii) it is a product only of the numbers 2, 3, 5 and 7. The fftw transform works most efficiently on arrays which have dimensions which are products of small primes.
XMM-Newton SOC/SSC -- 2006-06-28