.\" DO NOT MODIFY THIS FILE! It was generated by help2man 1.44.1. .TH GBACORR "1" "June 2015" "gbacorr 5.6.5" "User Commands" .SH NAME gbacorr \- Compute auto/cross-correlation coefficients .SH SYNOPSIS .B gbacorr [\fIoptions\fR] .SH DESCRIPTION Compute auto/cross\-correlation coefficients .PP If the input is a single columns x_1...X_T, the autocorrelation function c(t) is printed, defined as .IP c_{t} = 1/(T\-t\-1) \esum_i (x_i\-m) (x_{i+t}\-m) /s^2 .PP where m is the sample average and s the standard deviation. With a second column y_1...y_T, the cross\-correlation .IP c_{t} = 1/(T\-t\-1) \esum_i (x_i\-mx) (y_{i+t}\-my) /(sx sy) .PP is printed where mx and my are the average values of the two columns and sx and sy their standard deviations. With \fB\-M\fR 1 it is mx=my=0, the st.dev. is computed accordingly and in the previous formula T\-t\-1 is replaced by T\-t. The range of t is set by option \fB\-t\fR. Options .TP \fB\-M\fR choose the method (default '0'): .TP 0 auto/cross\-correlation with mean removal, .TP 1 auto/cross\-correlation without mean removal .TP \fB\-t\fR set range of t (default '0,10'), accept negative integers .TP \fB\-p\fR specify the confidence level in (0,1). Interval ac_low,ac_hi has a probability 1\-confidence to contain the true value. With this option the output becomes: lag ac ac_low ac_hi. .TP \fB\-F\fR specify the input fields separators (default " \et") .TP \fB\-h\fR this help .SH EXAMPLES .TP gbacorr \-t 0,2 'file(1)' first three a.c. coeff. of the first data column .IP gbacorr \-p 0.05 'file(1:2)' x\-corr of the first two columns together with .IP their 5% confidence intervals .SH AUTHOR Written by Giulio Bottazzi .SH "REPORTING BUGS" Report bugs to .PP .br Package home page .SH COPYRIGHT Copyright \(co 2001\-2015 Giulio Bottazzi This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License (version 2) as published by the Free Software Foundation; .PP This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.