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Re^2: update of Physical constants list
- From: Richard Mathar <mathar at strw dot leidenuniv dot nl>
- To: gsl-discuss at sourceware dot org
- Date: Thu, 16 Feb 2006 20:23:27 +0100
- Subject: Re^2: update of Physical constants list
bg> From bjg@network-theory.co.uk Wed Feb 15 15:30:12 2006
bg> From: Brian Gough <bjg@network-theory.co.uk>
bg> Cc: gsl-discuss@sourceware.org
bg> Subject: Re: update of Physical constants list
bg>
bg> Richard Mathar writes:
bg> rjm> Starting from gsl 1.7 it makes sense to update the natural
bg> rjm> constants of const/gsl_const_mksa.h and const/gsl_const_num.h
bg> rjm> according to some recent NIST values as patched with 'diff -u'
bg> rjm> below.
bg>
bg> Thanks. We should probably have some way to version these files, to
bg> avoid confusion over the changes in values.
bg> ...
To allow reproduction of results based on older versions of the constants,
one might include a simple cpp functionality
#ifdef GSL_CONST_MKSA_V17
....<versions GSL 1.7>
#else
....<most recent constants>
#endif
such that the unaware users get the most recent version, but others can
move back to GSL 1.7 by using a -D switch of their compiler to select
the older version.
Richard J. Mathar http://www.strw.leidenuniv.nl/~mathar