This is the Debian package of the GNU R package known as "gam".
The upstream author is Trevor Hastie
This package was created by Chris Lawrence ,
based on Dirk Eddelbuettel's packaging of r-cran-car.
The sources were downloaded from
http://www.cran.mirrors.pair.com/src/contrib/
The package was renamed from its upstream name 'gam' to 'r-cran-gam'
to fit the pattern of CRAN (and non-CRAN) packages for R.
Copyright (C) 2010-11 Trevor Hastie.
It has been placed under the GNU General Public License, version 2.
On Debian systems, the GPL is included in the file
/usr/share/common-licenses/GPL-2.
The upstream DESCRIPTION file for this package is available in
/usr/lib/R/site-library/gam/
loessc.c and loessf.f are distributed under the following license:
* Copyright (c) 1989, 1992 by AT&T.
* Permission to use, copy, modify, and distribute this software for any
* purpose without fee is hereby granted, provided that this entire notice
* is included in all copies of any software which is or includes a copy
* or modification of this software and in all copies of the supporting
* documentation for such software.
* THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTY. IN PARTICULAR, NEITHER THE AUTHORS NOR AT&T MAKE ANY
* REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY
* OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE.
The upstream source also includes a number of Ratfor programs, written
by Trevor Hastie and Robert Tibshirani, translated into plain Fortran
code. The original Ratfor programs, along with translations into
Fortran, can be found as a shell archive, available at:
http://lib.stat.cmu.edu/general/gamfit
Specifically, the following Fortran translations are included in this
package, named as follows:
Ratfor Fortran (gamfit) Fortran (r-cran-gam)
bakfit.r bakfit.f backfit.f
qsbart.r qsbart.r qsbart.f
sgram.r sgram.f sgram.f
sinerp.r sinerp.f sinerp.f
splsm.r splsm.f splsm.f
sslvrg.r sslvrg.f sslvrg.f
stxwx.r stxwx.f stxwx.f
Also, sbart.c is translated from sbart.f (and thus sbart.r) from Gamfit.
According to the authors, "This software is in the public domain."