ifft (MathScript Function) (Windows, Not in Base Package)

LabVIEW 8.5 Help
August 2007

NI Part Number:
371361D-01

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Member of the transforms class.

Syntax

c = ifft(a)

c = ifft(a, b)

c = fft(a, b, d)

c = fft(a, [], d)

Computes the inverse fast Fourier transform (IFFT). ifft computes the inverse discrete Fourier transform in the same manner as the Inverse FFT VI.

Name	Description
a	Specifies a vector or matrix.
b	Controls zero-padding to the signal. b is an integer and typically is a power of 2.
d	Specifies the dimension of a in which LabVIEW performs the IFFT. d is an integer.
[]	Tells LabVIEW that you want to specify a and d but not b.

Name	Description
c	Returns the inverse fast Fourier transform of a. If a is a vector, c = ifft(a) returns the original inverse discrete Fourier transform (IDFT). If a is a matrix, c = ifft(a) returns the column-wise inverse fast Fourier transforms of all columns of a. c is a vector or matrix.

A = [1 2 3 4; 4 3 2 1]
C = ifft(A, 8)