Provided by: gbutils_5.7.1-1_amd64

**NAME**

gbker2d - Kernel density estimate for bivariate data

**SYNOPSIS**

gbker2d[options]

**DESCRIPTION**

2D kernel density estimation on an equispaced grid. Data are read from standard input as couple (x,y). The kernel bandwidth if not provided with the option-His set automatically. Different bandwidths can be specified for x and y.

**OPTIONS**

-nnumber of points where the density is computed (default 10) use comma (,) to specify different values for x and y components-Hset the kernel bandwidth explicitly; use comma (,) to specify different values for x and y components-Sscale the kernel bandwidth with respect to euristic 'optimal' value; use comma (,) to specify different values for x and y components-Kchoose the kernel to use: 0: Epanenchnikov 1: Rectangular 2: Silverman type 1 3: Silverman type 2 (default 0)-Dswitch off data de-variation procedure-vverbose mode-Fspecify the input fields separators (default " \t")-hthis help

**EXAMPLES**

gbker2d -n 10,20 -K 1 < file compute the kernel on an equispaced grid 10x20 using a rectangular kernel

**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.