I needed a basic optimisation routine in some C-level code within an R package
I am developing, and the Brent_fmin function from
R/src/library/stats/src/optimize.c was a good starting point for me to modify.
The original file contains:
/*
* R : A Computer Language for Statistical Data Analysis
* Copyright (C) 1995, 1996 Robert Gentleman and Ross Ihaka
* Copyright (C) 2003-2004 The R Foundation
* Copyright (C) 1998--2014 The R Core Team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
<SNIP>
/* Formerly in src/appl/fmim.c */
/* fmin.f -- translated by f2c (version 19990503).*/
/* R's optimize() : function fmin(ax,bx,f,tol)
= ========== ~~~~~~~~~~~~~~~~~
<SNIP>
This function subprogram is a slightly modified version of
the
Algol 60 procedure localmin given in Richard Brent, Algorithms
for
Minimization without Derivatives, Prentice-Hall, Inc. (1973).
*/
static
double Brent_fmin(double ax, double bx, double (*f)(double, void *),
void *info, double tol)
I just use this Brent_fmin function within my package - nothing else from
stats. Obviously I want to make sure that my package attributes copyright
correctly, which I do by licensing my package as GPL-3, and retaining the
preamble from stat’s optimize.c along with a more detailed description of where
it came from and what has been modified. I will also include in my DESCRIPTION
file:
author(given=??, family=??, role=“cph”, comment="Original copyright
holder of the code in /src/optimize.cc”)
But which of the following is the actual copyright holder:
a) Richard Brent
b) Robert Gentleman and Ross Ihaka
c) The R Foundation
d) R Core Team
e) All (or some other combination) of the above
I am leaning towards just (d) as the author/copyright holder of the stats
package, but am not sure if it should (also?) be (a)? I would appreciate any
opinions on this.
Thanks in advance,
Matt
-----
Matthew Denwood
Associate Professor in Quantitative Veterinary Epidemiology and Biostatistics
Faculty of Health and Medical Sciences
University of Copenhagen
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