fft_kind, array, x1, x2, x3, x4, x5, x6, x7, x8 [, t=t]
This procedure calculates the vector wavenumber at each pixel in an n-dim fft array.
This procedure calculates the vector wavenumber at each pixel in an n-dim fft array. It's like indices.pro, except that the k's are normalized and shifted correctly to match the default structure of IDL's FFT command.
- array in required
An n-dimensional array (presumably an fft of something)
- t in optional
The spacing between each pixel in the pre-FT space. Scalar or vector of length equal to the dimensionality of array. The k value at each pixel in FFT space is 2 pi n/(N * T), where n is an integer, N is the number of pixels along a dimension, and T is the spacing (see FFT documentation). Defaults to 1
|Modifcation date:||Fri Jul 30 18:55:34 2010|