MATLAB Function Reference Previous page   Next Page

Data Analysis and Fourier Transforms

Basic Operations

cumprod Cumulative product
cumsum Cumulative sum
cumtrapz Cumulative trapezoidal numerical integration
max Maximum elements of array
mean Average or mean value of arrays
median Median value of arrays
min Minimum elements of array
prod Product of array elements
sort Sort array elements in ascending or descending order
sortrows Sort rows in ascending order
std Standard deviation
sum Sum of array elements
trapz Trapezoidal numerical integration
var Variance

Finite Differences

del2 Discrete Laplacian
diff Differences and approximate derivatives
gradient Numerical gradient

Correlation

corrcoef Correlation coefficients
cov Covariance matrix
subspace Angle between two subspaces

Filtering and Convolution

conv Convolution and polynomial multiplication
conv2 Two-dimensional convolution
convn N-dimensional convolution
deconv Deconvolution and polynomial division
detrend Linear trend removal
filter Filter data with infinite impulse response (IIR) or finite impulse response (FIR) filter
filter2 Two-dimensional digital filtering

Fourier Transforms

abs Absolute value and complex magnitude
angle Phase angle
fft One-dimensional discrete Fourier transform
fft2 Two-dimensional discrete Fourier transform
fftn N-dimensional discrete Fourier Transform
fftshift Shift DC component of discrete Fourier transform to center of spectrum
fftw Interface to the FFTW library run-time algorithm for tuning FFTs
ifft Inverse one-dimensional discrete Fourier transform
ifft2 Inverse two-dimensional discrete Fourier transform
ifftn Inverse multidimensional discrete Fourier transform
ifftshift Inverse fast Fourier transform shift
nextpow2 Next power of two
unwrap Correct phase angles

Previous page  Elementary Math Polynomials Next page

© 1994-2005 The MathWorks, Inc.