NAME
corcoll - determines cross correlation function of columnar data
SYNOPSIS
corrcol [data_file] [bias] [slope] [auto] [auto2] [max] [verbose]
DESCRIPTION
corrcol computes the cross correlation function of the first two
columns in stdin or the optional data_file specified on the command line. An
optional bias level or slope is subtracted from the data if
these options are specified (the slope actually fits a line so the bias
option is redundant). The correlation function is printed to stdout unless
the max option is specified at which time only the maximum lag and
value are printed
out.
The algorithm computes the correlation function by the Fourier transform
method discussed in chapter 12 of Numeri_cal Recipes.
The number of points in the transform is the next factor of two that is
greater than or equal to the number of input data points. Unspecified points
are padded with
zeroes.
You can compute the auto-correlation function of the first or second columns
alone by specifying the auto or auto2
options.
The verbose option prints information such as the bias or slope
levels. to
stderr.