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: invfft

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

Usage: y = fft (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: invfft

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

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