Contents

(/tools/hpmatlab/toolbox/matlab/datafun/Contents.m)

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 Data analysis and Fourier transform functions.
 Copyright (c) 1984-93 by The MathWorks, Inc.

 Basic operations.
   max         - Largest component.
   min         - Smallest component.
   mean        - Average or mean value.
   median      - Median value.
   std         - Standard deviation.
   sort        - Sort in ascending order. 
   sum         - Sum of elements.
   prod        - Product of elements.
   cumsum      - Cumulative sum of elements.
   cumprod     - Cumulative product of elements.
   trapz       - Numerical integration using trapezoidal method.

 Finite differences.
   diff        - Difference function and approximate derivative.
   gradient    - Approximate gradient.
   del2        - Five-point discrete Laplacian.

 Correlation.
   corrcoef    - Correlation coefficients.
   cov         - Covariance matrix.
   subspace    - Angle between subspaces.

 Filtering and convolution.
   filter      - One-dimensional digital filter.
   filter2     - Two-dimensional digital filter.
   conv        - Convolution and polynomial multiplication.
   conv2       - Two-dimensional convolution.
   deconv      - Deconvolution and polynomial division.

 Fourier transforms.
   fft         - Discrete Fourier transform.
   fft2        - Two-dimensional discrete Fourier transform.
   ifft        - Inverse discrete Fourier transform.
   ifft2       - Two-dimensional inverse discrete Fourier transform.
   abs         - Magnitude.
   angle       - Phase angle.
   unwrap      - Remove phase angle jumps across 360 degree boundaries.
   fftshift    - Move zeroth lag to center of spectrum.
   cplxpair    - Sort numbers into complex conjugate pairs.
   nextpow2    - Next higher power of 2.