Keywords - Function groups - @ A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Group: Mathematical Functions
Topic: Fourier and Wavelet transforms
See also: fft

Function: invfft
Description: invfft computes the Inverse Fast Fourier Transformation of a complex vector.

Usage: y = invfft (x)
Input:
x p x 2 matrix
Output:
y p x 2 matrix

Note:

Example:



randomize(0)

x = normal(4)

y = #(0,0,0,0)

z=fft(x~y)  

invfft(z)

Result:



Contents of invfft

[1,] -0.21293     0 

[2,] -1.0078 -9.9048e-17 

[3,]  1.9502      0 

[4,] -1.3052  9.9048e-17 


Group: Mathematical Functions
Topic: Fourier and Wavelet transforms
See also: fft

Keywords - Function groups - @ A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

(C) MD*TECH Method and Data Technologies, 21.9.2000