GBXCORR(1)

✨ gbxcorr(1) ✨ — the User Commands corner of the manual, bestie 💅

okay so bestie, welcome to gbxcorr(1), and no cap, this little cutie is the main character of correlation matrices 👑

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🦋 NAME 🦋

gbxcorr — compute cross correlation matrix ✨ literally that's the whole vibe

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🌸 SYNOPSIS 🌸

gbxcorr [options]

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💖 DESCRIPTION 💖

so the way this works is you hand it a data matrix A with N rows and T columns, like:

A = [ a_{t,i} ]
       with t=1,..,T  i=1,...,N

and it goes and computes the NxN correlation matrix C [ c_{i,j} ] using whichever method you told it to use with the -M option 🫶

With method 0 it's giving:

c_{i,j} = 1/(T-1) \sum_t (a_{t,i}-m_i) (a_{t,j}-m_j)

where m_i is the i-th mean. Iconic, mean-removal core 💅

And with method 1 it's giving:

c_{i,j} = 1/T \sum_t a_{t,i} a_{t,j} .

no mean removal, just raw vibes 🌈

Also bestie, heads up on where stuff gets stashed: covariance lives in the lower triangle while correlation coefficients live in the upper triangle 🎀

⚠️ WARNING: previous implementations were row-wise instead of column-wise 😭 not me having to tell you this but fr fr, watch out.

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🎀 OPTIONS 🎀

• -M — choose the method (default 0) ✨
  • 0 — covariance/correlation with mean removal 🧚
  • 1 — covariance/correlation without mean removal 🔥
• -F — specify the input fields separators (default " \t") 👀
• -h — this help 🫶

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👑 AUTHOR 👑

Written by Giulio Bottazzi 💜

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💀 REPORTING BUGS 💀

Report bugs to <gbutils@googlegroups.com> — they wanna hear it, bestie, tell them everything 🐛

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

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🌟 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. 🎀

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so that's the whole page bestie, go compute something slay 💅✨

gbxcorr 6.0.beta2 — that's the version, and it's from October 2018 🗓️ mwah, love that for it 🫶💖