Bug#752876: Comments regarding r-cran-spdep_0.5-92-1_amd64.changes
Hi Andreas,
I have added:
/*
This code is described in "Computational Geometry in C" (Second Edition),
Chapter 8. It is not written to be comprehensible without the
explanation in that book.
Prints out one arm configuration to reach given target.
Assumes number of links >= 3.
Input:
nlinks Number of links
L1 L2 ... Ln Link lengths
x0 y0 target0
x1 x2 target1
...
Written by Joseph O'Rourke.
Last modified: December 1997
Questions to orourke@cs.smith.edu.
--------------------------------------------------------------------
This code is Copyright 1998 by Joseph O'Rourke. It may be freely
redistributed in its entirety provided that this copyright notice is
not removed.
--------------------------------------------------------------------
*/
to spdep/src/soigraph.c (committed to R-forge, will be released when the
next release occurs). This is the comment at the top of arm.c from:
http://cs.smith.edu/~orourke/CGCode/SecondEdition/Ccode2.tar.gz
which is the author's code distribution site, and is more relevant than
the printed text of the book. We've used the same approach in sp/src/pip.c
for over ten years without attracting Debian's ire.
Nicholas and I understood in 2001 that ... may be freely redistributed ...
could reasonably be taken as permission to include and redistribute these
small functions.
Do you want me to revisit the separate packaging of data sets?
Best wishes,
Roger
On Mon, 4 Apr 2016, Andreas Tille wrote:
Hi Roger,
I hope you remember the discussion we had two years ago when I tried to
package spdep for Debian as a dependency to test some R epipdemiology
tools. I somehow gave up since the packages can be run with out spdep.
However, we have now some bioinformatics tools that have a strong
dependency and so we need to dive into this again.
As you can read below the Debian ftpmaster has reviewed the source code
of spdep and found a weak part in the licensing. If you ask me this
issue is also relevant for distributing spdep code on CRAN but nobody
has stumbled upon this before. It would be great if you could clarify
the license of these pieces of code or replace it by some alternative
free code.
Kind regards and thanks for your support
Andreas.
On Sun, Apr 03, 2016 at 04:49:37PM +0000, Thorsten Alteholz wrote:
Hi Andreas,
the issues about src/soigraph.c are not really solved.
According to the file:
* The subroutines TwoCirclesxx and SubVec are adapted for R and Double
* precision coordinates by Nicholas Lewin-Koh, from Computational
* Geometry in C, Joseph O'Rourke, Cambridge University Press
* (1998), specifically from arm/arm.c. Copyright for those subroutines
* remains his.
As you can see, for example on Amazon, this book contains a paragraph:
This book is in copyright. (...) no reproduction of any part may take
place without the written permission of Cambridge University Press.
From my point of view this does not look like that "This code may be
freely redistributed" ...
Thorsten
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Roger Bivand
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