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

# gbmodes(1)

Analyze multimodality in univariate data

## NAME

gbmodes - Analyze multimodality in univariate data

## SYNOPSIS

**gbmodes** \[*options*\]

## DESCRIPTION

Multimodality analysis via kernel density estimation. Compute the maximal kernel bandwidth h\_c(M) for which #(modes in the estimated density)\>M.The significance of h\_c is computed via smoothed bootstrap. Read data from std. input. Print the couple h\_c p(h\_c) and the modal values (set with **-O**).

## OPTIONS

- **-n**

  number of equispaced points where the density is computed (default 100)

- **-m**

  number of modes (default 1)

- **-r**

  search range for modes; comma separated couple 'data\_min,data\_max'

- **-s**

  scale the search range to \[min\*s+(1-s)\*Max,Max\*s+(1-s)\*min\] (default 1)

- **-e**

  relative tolerance on h\_c value (default 1e-6)

- **-S**

  significance level (for Hall-York correction) (default .05)

- **-t**

  number of bootstrap trials used for significance computation (default 1000)

- **-R**

  RNG seed for bootstrap trials (default 0)

- **-K**

  choose the kernel to use: 0 Gaussian or 1 Laplacian  (default 0)

- **-v**

  verbose mode (more verbose if provided 2 times)

- **-O**

  output type (default 0)

- 0

  h\_c p(h\_c) \[modes locations\]

- 1

  h\_c \[modes locations and heights\]

- **-F**

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

- **-h**

  this help

## 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.