DOKK / manpages / debian 10 / gbutils / gbker.1.en
GBKER(1) User Commands GBKER(1)

gbker - Produce kernel density estimation

gbker [options]

Compute the kernel density estimation on an equispaced grid. Data are read from standard input. The kernel bandwidth, if not provided with the option -H, is set automatically using simple heuristics. Normally the whole support is displayed. The option -w can be used to restrict the computation to specific range of values. The method used to compute the density is set by the option -M. The boundaries of the grid are slightly different in the different cases.

number of equispaced points/bins where the density is computed (default 64)
set the grid boundaries with min,max (default whole support)
set the kernel bandwidth
scale the automatic kernel bandwidth
choose the kernel to use (default 0)
choose the method for density computation (default 0)
use FFT (# grid points rounded to nearest power of 2)
use discrete convolution (compact kernels only; bins>2)
explicit summation (boundaries excluded)
specify the input fields separators (default " \t")

use a Gaussian kernel to compute the density on 128 equispaced points with the FFT approach. All the data in 'file' are used, multiple columns are pooled.
use a Laplacian kernel to compute the density on 64 points. The method used is the explicit summation.

Written by Giulio Bottazzi

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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.

March 2018 gbker 5.7.1