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|
-----------------------------------------
A simple scientific library for Haskell
-----------------------------------------
INSTALLATION
See the INSTALL file.
TESTS ---------------------------------------------
$ ghci
Prelude> Numeric.LinearAlgebra.Tests.runTests 20
EXAMPLES ------------------------------------------------------
$ ghci
Prelude> :m + Numeric.GSL
Prelude Numeric.GSL> let quad = integrateQNG 1E-10
Prelude Numeric.GSL> quad (^2) 0 1
(0.3333333333333333,3.700743415417188e-15)
Prelude Numeric.GSL> :m + Numeric.LinearAlgebra
Prelude Numeric.LinearAlgebra> let m = (2><3)[1,2,3,4,5,6::Double]
Prelude Numeric.LinearAlgebra> let (u,d,v) = full svd m
Prelude Numeric.LinearAlgebra> d
(2><3)
[ 9.508032000695724, 0.0, 0.0
, 0.0, 0.7728696356734838, 0.0 ]
Prelude Numeric.LinearAlgebra> u <> d <> trans v
(2><3)
[ 1.0000000000000004, 2.0, 3.0
, 3.9999999999999996, 5.000000000000001, 6.0 ]
Prelude Numeric.GSL> :q
Leaving GHCi.
A number of illustrative programs are included in the examples folder.
KNOWN PROBLEMS / BUGS -------------------------------
- On 64-bit machines the example "minimize.hs", when run from ghci,
produces a segmentation fault. It happens in the call to
gsl_multimin_fdfminimizer_alloc, inside the C wrapper.
If the program is called by runhaskell, it just terminates
prematurely, producing no results. Curiously, in compiled mode the
program seems to work perfectly well.
- On Ubuntu 6.06 LTS (Dapper) atlas3-sse2-dev (3.6.0-20)
produced segmentation faults when working with big matrices
on compiled programs.
ACKNOWLEDGEMENTS -----------------------------------------------------
I thank Don Stewart, Henning Thielemann, Bulat Ziganshin and all the people
in the Haskell mailing lists for their help.
- Nico Mahlo discovered a bug in the eigendecomposition wrapper.
- Frederik Eaton discovered a bug in the design of the wrappers.
- Eric Kidd has created a wiki page explaining the installation on MacOS X:
http://www.haskell.org/haskellwiki/GSLHaskell_on_MacOS_X
- Fawzi Mohamed discovered a portability bug in the lapack wrappers.
- Pedro E. López de Teruel fixed the interface to lapack.
- Antti Siira discovered a bug in the plotting functions.
- Paulo Tanimoto helped to fix the configuration of the required libraries.
He also discovered the segfault of minimize.hs in ghci.
- Xiao-Yong Jin reported a bug on x86_64 caused by the assumptions in f2c.h,
which are wrong for this architecture.
- Jason Schroeder reported an error in the documentation.
- Bulat Ziganshin gave invaluable help for the ST monad interface to
in-place modifications.
- Don Stewart fixed the implementation of the internal data structures
to achieve excellent, C-like performance in Haskell functions which
explicitly work with the elements of vectors and matrices.
- Dylan Alex Simon improved the numeric instances to allow optimized
implementations of signum and abs on Vectors.
- Pedro E. López de Teruel discovered the need of asm("finit") to
avoid the wrong NaNs produced by foreign functions.
- Reiner Pope added support for luSolve, based on (d|z)getrs.
- Simon Beaumont reported the need of QuickCheck<2 and the invalid
asm("finit") on ppc. He also contributed the configuration options
for the accelerate framework on OS X.
- Daniel Schüssler added compatibility with QuickCheck 2 as well
as QuickCheck 1 using the C preprocessor. He also added some
implementations for the new "shrink" method of class Arbitrary.
- Tracy Wadleigh improved the definitions of (|>) and (><), which now
apply an appropriate 'take' to the given lists so that they may be
safely used on lists that are too long (or infinite).
- Chris Waterson improved the configure.hs program for OS/X.
- Erik de Castro Lopo added buildVector and buildMatrix, which take a
size parameter(s) and a function that maps vector/matrix indices
to the values at that position.
- Jean-Francois Tremblay discovered an error in the tutorial.
|
