GBKER(1)

📦
version 6.3 · 2 versions
  • 6.3 · debian bookworm, debian trixie, ubuntu noble, ubuntu questing, ubuntu resolute, ubuntu stonking (latest)
  • 6.0 · ubuntu jammy
, in debian bookworm, debian trixie, ubuntu noble, ubuntu questing, ubuntu resolute, ubuntu stonking

💖 GBKER — the gbker manual page, but make it cute 💖

okay bestie, sit down, hydrate, because we're about to talk about gbker — a User Command that produces kernel density estimation. yes it's a mouthful. yes it slays. let's go 🫶

✨ NAME ✨

gbker — produce kernel density estimation

🌸 SYNOPSIS 🌸

gbker [options]

🦋 DESCRIPTION 🦋

so basically, gbker computes the kernel density estimation on an equispaced grid. the data? read from standard input, obviously. 💅

the kernel bandwidth — if you don't hand it over with the -H option — gets set automatically using simple heuristics. no cap, it just figures it out.

normally the whole support is displayed. but if you wanna be picky (respect), the -w option restricts the computation to a specific range of values. and the method used to compute the density? that's the -M option's whole job. heads up though: the boundaries of the grid are slightly different in the different cases. 🎀

💅 OPTIONS 💅

  • -n — number of equispaced points/bins where the density is computed (default 64)
  • -w — set the grid boundaries with min,max (default whole support)
  • -H — set the kernel bandwidth
  • -S — scale the automatic kernel bandwidth
  • -K — choose the kernel to use (default 0)
    • 0 — Epanenchnikov
    • 1 — Rectangular
    • 2 — Gaussian
    • 3 — Laplacian
  • -M — choose the method for density computation (default 0)
    • 0 — use FFT (# grid points rounded to nearest power of 2)
    • 1 — use discrete convolution (compact kernels only; bins>2)
    • 2 — explicit summation (boundaries excluded)
  • -F — specify the input fields separators (default " \t")

🌈 EXAMPLES 🌈

gbker -n 128 -K 2 < file

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. iconic behaviour fr fr ✨

gbker -K 3 -M 2 < file

use a Laplacian kernel to compute the density on 64 points. the method used is the explicit summation. lowkey elegant 🎀

👑 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>

bestie if you find a bug, tell them, don't just suffer in silence 💀

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.

⚠️ real talk: that warranty disclaimer is not a vibe, it's a warning. no warranty, periodt.

and that's the whole page, bestie 🫶 this was gbker 6.2, dated June 2021, living its best life as a User Commands manual page. go forth and estimate those densities 💖✨🎀

📦 where this page comes from