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fftserver.mfft - Function

	Package	utility
	Module	mathematics
	Tool	fftserver

mutiple Fourier transforms.

Synopsis
mfft(a, axes, forward)

Arguments

a		Complex array to transform
axes		axes to transform
		Allowed:	Vector of Booleans
forward		Direction of the transform
		Allowed:	T=forward, F=reverse
		Default:	T

Returns
Complex array the same size as the input array

Description
This function does a complex Fourier transform along user selected axes of an N-dimensional array. Transforms are done along the axes where the axes vector is True. The axes vector must have the same number of elements as the number of dimensions in the input array.

Backward transforms are specified by setting the forward argument to False. The default is to do forward transforms.

The returned (transformed) array is the same shape as the input array.

Example

include 'fftserver.g'
server := fftserver();
a := array(0,3,4);
a[,] := 1;                   # set all elements to 1
b1 := server.mfft(a, [T,F]); # transform along axis 1 
b2 := server.mfft(a, [F,T]); # transform along axis 2
b := server.mfft(a, [T,T]);  # transform along both axes, ie., a 2-D transform.