Data processing and statistics

x should be numerical vector or matrix.
fft(x): fast Fourier transform of vector x. If x is matrix or multidimensional matrix, return 2D or multidimensional transform.

ifft(x): inverse fast Fourier transform of x.

sum(x): sum of all elements of vector or matrix
mean(x): mean of all elements of vector or matrix
max(x): maximum of all elements of vector or matrix
min(x): minimum of all elements of vector or matrix
range(x): minumum and maximum of all elements of vector or matrix, returned as a vector
var(x): variance of all elements of vector or matrix
stddev(x): variance of all elements of vector or matrix
rowsum(x): sum of all elements in each row
rowmean(x): mean of all elements in each row
rowmax(x): maximum of all elements in each row
rowmin(x): minimum of all elements in each row
rowrange(x): minumum and maximum of all elements in each row returned as a vector
rowvar(x): variance of all elements in each row
rowstddev(x): variance of all elements in each row
columnsum(x): sum of all elements in each column
columnmean(x): mean of all elements in each column
columnmax(x): maximum of all elements in each column
columnmin(x): minimum of all elements in each column
columnrange(x): minumum and maximum of all elements in each column returned as a vector
columnvar(x): variance of all elements in each column
columnstddev(x): variance of all elements in each column

oz 2009-12-22