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GNU Scientific Library 2.0 released

Item posted by Patrick Alken <psa> on Sat 31 Oct 2015 07:32:02 PM UTC.

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-Fran├žois 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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