---
name: "gbtest"
section: "1"
platform: "linux"
package: "gbutils"
version: "6.3-1+b1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/gbtest"
---

# gbtest(1)

Compute statistical tests on data

## NAME

gbtest - Compute statistical tests on data

## SYNOPSIS

**gbtest** \[*options*\] *\<tests list\>*

## DESCRIPTION

Compute statistical tests on data. Each test is specified by a unique name and optional parameters follows, separated by commas. Depending on the test, one, two or three columns of data are expected. '1 dist' tests expect data in \[0,1\] from a distribution function. '1 sample' tests expect a single columns. Test on 'pairs' expect two columns of equal length. Test on '2 samples' expect two columns of data, possibly of different length. Test on 2+ and 3+ samples expect a varying number of columns. If more columns are provided, the test is repeated for any column in the case of 1 sample test, and any couple of columns in the case of 2 sample tests. In the last case, the output is expressed in matrix format, with estimated statistics on the lower triangle and p-scores (if requested) on the upper. The removal of 'nan' entries is automatic, and is performed consistently with the nature of the test.

Tests typically assume 1, 2 or 3+ samples. Available tests are:

- D+,D-,D,V 1 dist

  Kolmogorov-Smirnov tests on cumulated data

- W2,A2,U2

  1 dist   Cramer-von Mises tests on cumulated data

- CHI2-1

  1 samp   Chi-Sqrd, 1 samp. 2nd column: th. prob.

- WILCO

  1 samp   Wilcoxon signed-rank test (mode=0)

- TS

  1 samp   Student's T (mean=0)

- TR-TP

  1 samp   Test of randomness: turning points

- TR-DS

  1 samp   Test of randomness: difference sign

- TR-RT

  1 samp   Test of randomness: rank test

- R

  pairs    Pearson's correlation coefficient

- RHO

  pairs    Spearman's Rho rank correlation

- TAU

  pairs    Kendall's Tau correlation

- CHI2-2

  pairs    Chi-Sqrd, 2 samples

- TP

  pairs    Student's T with paired samples

- WILCO2

  pairs    Wilcoxon test on paired samples

- KS

  2 samp   Kolmogorov-Smirnov test

- T

  2 samp   Student's T with same variances

- TH

  2 samp   Student's T with different variances

- F

  2 samp   F-Test for different variances

- WMW

  2 samp   Wilcoxon-Mann-Whitney U

- FP

  2 samp   Fligner-Policello standardized U^

- LEV-MEAN

  2+ samp  Levene equality of variances using means

- LEV-MED

  2+ samp  Levene equality of variances using medians

- KW

  3+ samp  Kruscal-Wallis test on 3+ samples

- CHI2-N

  3+ samp  Multi-columns contingency table analysis

## OPTIONS

- **-p**

  compute associated significance

- **-s**

  input data are already sorted in ascending order

- **-F**

  specify the input fields separators (default " \\t")

- **-o**

  set the output format (default '%12.6e')

- **-v**

  verbosity: 0 none, 1 headings, 2+ description (default 0)

- **-h**

  this help

## EXAMPLES

- gbtest FP \< file

  compute the Fligner-Policello test on the columns of 'file', considering all possible pairings.

- gbtest KW -p \< file

  compute the Kruscal-Wallis test and its p-score on the first three columns of data in 'file'

## AUTHOR

Written by Giulio Bottazzi

## REPORTING BUGS

Report bugs to \<gbutils@googlegroups.com\>

Package home page \<http://cafim.sssup.it/~giulio/software/gbutils/index.html\>

## COPYRIGHT

Copyright © 2001-2018 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;

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.