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Rundeck: P1SoM40

Created: Thu May 9 03:30:17 EDT 2024

fft

Module:

File: FFT72.f

Summary: FFT calculates fast fourier transform of an input array F
Author : Gary Russell
Version: 1.0

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Declaration:

subroutine fft (f, a, b)

Calls the following subroutines/functions:

docalc

Module: Global File: FFT72.f
DOCALC calculate intermediate expressions for FFT

Variables:

f : real*8, intent(in), dimension(KM)

input gridpoint array

a : real*8, intent(out), dimension(0:KM/2)

fourier coeffs. (cos)

b : real*8, intent(out), dimension(0:KM/2)

fourier coeffs. (sin)

n : integer

loop variables