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GNU Scientific Library 2.0 released

From: Patrick Alken
Subject: GNU Scientific Library 2.0 released
Date: Sat, 31 Oct 2015 16:00:39 -0600
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0

 Version 2.0 of the GNU Scientific Library (GSL) is now available. GSL
provides a large collection of routines for numerical computing in C.
The major version number was increased, since a number of internal
workspaces have changed and so existing binaries must be recompiled
against this new library. There are also a small number of API changes
and deprecated functions.

This release includes significant new features and bug fixes:

* Sparse matrices
* Regularized least squares
* 2D interpolation
* New nonlinear least squares solver

The full NEWS file entry is appended below.

The file details for this release are:

The GSL project homepage is

GSL is free software distributed under the GNU General Public License.

Thanks to everyone who reported bugs and contributed improvements.

Patrick Alken

* What is new in gsl-2.0:

** fixed bug #43258 for hypergeometric functions (Raymond Rogers)

** added L-curve analysis routines for linear Tikhonov regression

** add running statistics module

** added bilinear and bicubic interpolation (David Zaslavsky)

** added function gsl_multifit_robust_residuals to compute robust
   fit residuals

** added Steffen monotonic interpolation method (Jean-François Caron)

** added new nonlinear least squares solver 'lmniel' suitable for
   systems with large numbers of data

** nonlinear least squares solver now tracks the number of function
   and Jacobian evaluations, see example program for details

** the 'fdf' field of gsl_multifit_function_fdf is now deprecated
   and does not need to be specified for nonlinear least squares

** added extensive test suite to nonlinear least squares module,
   resulting in a few minor bug fixes; the routine
   gsl_multifit_fdfsolver_driver has been rewritten (with API change)
   to handle the various error codes of the lmsder iterate
   routine, resulting in a high level caller which is highly robust
   for a wide class of problems

** added support for sparse matrices, including a GMRES
   iterative linear solver

** added routines gsl_linalg_givens and gsl_linalg_givens_gv
   for Givens rotations

** added Tikhonov (ridge) regularization to least squares module
   (linear and nonlinear)

** removed unused argument 'n' from gsl_sf_ellint_D

** merged bspline_deriv_workspace into bspline_workspace to simplify
   bspline API; the functions
   are now deprecated and will be removed in a future release.

** merged ALF extension into GSL for associated Legendre functions;
   api has changed; consequently the functions:
   are now deprecated and will be removed in a future release.

** added function gsl_multifit_robust_weights to allow user to
   access the various weighting functions

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