SYNOPSIS
use Math::GSL::BLAS qw/:all/;
use Math::GSL::Matrix qw/:all/;
# matrixmatrix product of double numbers
my $A = Math::GSL::Matrix>new(2,2);
$A>set_row(0, [1, 4]);
>set_row(1, [3, 2]);
my $B = Math::GSL::Matrix>new(2,2);
$B>set_row(0, [2, 1]);
>set_row(1, [5,3]);
my $C = Math::GSL::Matrix>new(2,2);
gsl_matrix_set_zero($C>raw);
gsl_blas_dgemm($CblasNoTrans, $CblasNoTrans, 1, $A>raw, $B>raw, 1, $C>raw);
my @got = $C>row(0)>as_list;
print "The resulting matrix is: \n[";
print "$got[0] $got[1]\n";
@got = $C>row(1)>as_list;
print "$got[0] $got[1] ]\n";
# compute the scalar product of two vectors :
use Math::GSL::Vector qw/:all/;
use Math::GSL::CBLAS qw/:all/;
my $vec1 = Math::GSL::Vector>new([1,2,3,4,5]);
my $vec2 = Math::GSL::Vector>new([5,4,3,2,1]);
my ($status, $result) = gsl_blas_ddot($vec1>raw, $vec2>raw);
if($status == 0) {
print "The function has succeeded. \n";
}
print "The result of the vector multiplication is $result.\n";
DESCRIPTION
The functions of this module are divised into 3 levels:Level 1  Vector operations
 "gsl_blas_sdsdot"
 "gsl_blas_dsdot"
 "gsl_blas_sdot"
 "gsl_blas_ddot($x, $y)"
 This function computes the scalar product x^T y for the vectors $x and $y. The function returns two values, the first is 0 if the operation succeeded, 1 otherwise and the second value is the result of the computation.
 "gsl_blas_cdotu"
 "gsl_blas_cdotc"
 "gsl_blas_zdotu($x, $y, $dotu)"
 This function computes the complex scalar product x^T y for the complex vectors $x and $y, returning the result in the complex number $dotu. The function returns 0 if the operation succeeded, 1 otherwise.
 "gsl_blas_zdotc($x, $y, $dotc)"
 This function computes the complex conjugate scalar product x^H y for the complex vectors $x and $y, returning the result in the complex number $dotc. The function returns 0 if the operation succeeded, 1 otherwise.
 "gsl_blas_snrm2" =item "gsl_blas_sasum"
 "gsl_blas_dnrm2($x)"

This function computes the Euclidean norm
x_2 = \sqrt {\sum x_i^2}
of the vector $x.
 "gsl_blas_dasum($x)"
 This function computes the absolute sum \sum x_i of the elements of the vector $x.
 "gsl_blas_scnrm2"
 "gsl_blas_scasum"
 "gsl_blas_dznrm2($x)"
 This function computes the Euclidean norm of the complex vector $x, x_2 = \sqrt {\sum (\Re(x_i)^2 + \Im(x_i)^2)}.
 "gsl_blas_dzasum($x)"
 This function computes the sum of the magnitudes of the real and imaginary parts of the complex vector $x, \sum \Re(x_i) + \Im(x_i).
 "gsl_blas_isamax"
 "gsl_blas_idamax"
 "gsl_blas_icamax"
 "gsl_blas_izamax "
 "gsl_blas_sswap"
 "gsl_blas_scopy"
 "gsl_blas_saxpy"
 "gsl_blas_dswap($x, $y)"
 This function exchanges the elements of the vectors $x and $y. The function returns 0 if the operation succeeded, 1 otherwise.
 "gsl_blas_dcopy($x, $y)"
 This function copies the elements of the vector $x into the vector $y. The function returns 0 if the operation succeeded, 1 otherwise.
 "gsl_blas_daxpy($alpha, $x, $y)"
 These functions compute the sum $y = $alpha * $x + $y for the vectors $x and $y.
 "gsl_blas_cswap"
 "gsl_blas_ccopy "
 "gsl_blas_caxpy"
 "gsl_blas_zswap"
 "gsl_blas_zcopy"
 "gsl_blas_zaxpy "
 "gsl_blas_srotg"
 "gsl_blas_srotmg"
 "gsl_blas_srot"
 "gsl_blas_srotm "
 "gsl_blas_drotg"
 "gsl_blas_drotmg"
 "gsl_blas_drot($x, $y, $c, $s)"
 This function applies a Givens rotation (x', y') = (c x + s y, s x + c y) to the vectors $x, $y.
 "gsl_blas_drotm "
 "gsl_blas_sscal"
 "gsl_blas_dscal($alpha, $x)"
 This function rescales the vector $x by the multiplicative factor $alpha.
 "gsl_blas_cscal"
 "gsl_blas_zscal "
 "gsl_blas_csscal"
 "gsl_blas_zdscal"
Level 2  Matrixvector operations
 "gsl_blas_sgemv"
 "gsl_blas_strmv "
 "gsl_blas_strsv"
 "gsl_blas_dgemv($TransA, $alpha, $A, $x, $beta, $y)"  This function computes the matrixvector product and sum y = \alpha op(A) x + \beta y, where op(A) = A, A^T, A^H for $TransA = $CblasNoTrans, $CblasTrans, $CblasConjTrans (constant values coming from the CBLAS module). $A is a matrix and $x and $y are vectors. The function returns 0 if the operation succeeded, 1 otherwise.
 "gsl_blas_dtrmv($Uplo, $TransA, $Diag, $A, $x)"  This function computes the matrixvector product x = op(A) x for the triangular matrix $A, where op(A) = A, A^T, A^H for $TransA = $CblasNoTrans, $CblasTrans, $CblasConjTrans (constant values coming from the CBLAS module). When $Uplo is $CblasUpper then the upper triangle of $A is used, and when $Uplo is $CblasLower then the lower triangle of $A is used. If $Diag is $CblasNonUnit then the diagonal of the matrix is used, but if $Diag is $CblasUnit then the diagonal elements of the matrix $A are taken as unity and are not referenced. The function returns 0 if the operation succeeded, 1 otherwise.
 "gsl_blas_dtrsv($Uplo, $TransA, $Diag, $A, $x)"  This function computes inv(op(A)) x for the vector $x, where op(A) = A, A^T, A^H for $TransA = $CblasNoTrans, $CblasTrans, $CblasConjTrans (constant values coming from the CBLAS module). When $Uplo is $CblasUpper then the upper triangle of $A is used, and when $Uplo is $CblasLower then the lower triangle of $A is used. If $Diag is $CblasNonUnit then the diagonal of the matrix is used, but if $Diag is $CblasUnit then the diagonal elements of the matrix $A are taken as unity and are not referenced. The function returns 0 if the operation succeeded, 1 otherwise.
 "gsl_blas_cgemv "
 "gsl_blas_ctrmv"
 "gsl_blas_ctrsv"
 "gsl_blas_zgemv "
 "gsl_blas_ztrmv"
 "gsl_blas_ztrsv"
 "gsl_blas_ssymv"
 "gsl_blas_sger "
 "gsl_blas_ssyr"
 "gsl_blas_ssyr2"
 "gsl_blas_dsymv"
 "gsl_blas_dger($alpha, $x, $y, $A)"  This function computes the rank1 update A = alpha x y^T + A of the matrix $A. $x and $y are vectors. The function returns 0 if the operation succeeded, 1 otherwise.
 "gsl_blas_dsyr($Uplo, $alpha, $x, $A)"  This function computes the symmetric rank1 update A = \alpha x x^T + A of the symmetric matrix $A and the vector $x. Since the matrix $A is symmetric only its upper half or lower half need to be stored. When $Uplo is $CblasUpper then the upper triangle and diagonal of $A are used, and when $Uplo is $CblasLower then the lower triangle and diagonal of $A are used. The function returns 0 if the operation succeeded, 1 otherwise.
 "gsl_blas_dsyr2($Uplo, $alpha, $x, $y, $A)"  This function computes the symmetric rank2 update A = \alpha x y^T + \alpha y x^T + A of the symmetric matrix $A, the vector $x and vector $y. Since the matrix $A is symmetric only its upper half or lower half need to be stored. When $Uplo is $CblasUpper then the upper triangle and diagonal of $A are used, and when $Uplo is $CblasLower then the lower triangle and diagonal of $A are used.
 "gsl_blas_chemv"
 "gsl_blas_cgeru "
 "gsl_blas_cgerc"
 "gsl_blas_cher"
 "gsl_blas_cher2"
 "gsl_blas_zhemv "
 "gsl_blas_zgeru($alpha, $x, $y, $A)"  This function computes the rank1 update A = alpha x y^T + A of the complex matrix $A. $alpha is a complex number and $x and $y are complex vectors. The function returns 0 if the operation succeeded, 1 otherwise.
 "gsl_blas_zgerc"
 "gsl_blas_zher($Uplo, $alpha, $x, $A)"  This function computes the hermitian rank1 update A = \alpha x x^H + A of the hermitian matrix $A and of the complex vector $x. Since the matrix $A is hermitian only its upper half or lower half need to be stored. When $Uplo is $CblasUpper then the upper triangle and diagonal of $A are used, and when $Uplo is $CblasLower then the lower triangle and diagonal of $A are used. The imaginary elements of the diagonal are automatically set to zero. The function returns 0 if the operation succeeded, 1 otherwise.
 "gsl_blas_zher2 "
Level 3  Matrixmatrix operations
 "gsl_blas_sgemm"
 "gsl_blas_ssymm"
 "gsl_blas_ssyrk"
 "gsl_blas_ssyr2k "
 "gsl_blas_strmm"
 "gsl_blas_strsm"
 "gsl_blas_dgemm($TransA, $TransB, $alpha, $A, $B, $beta, $C)"  This function computes the matrixmatrix product and sum C = \alpha op(A) op(B) + \beta C where op(A) = A, A^T, A^H for $TransA = $CblasNoTrans, $CblasTrans, $CblasConjTrans and similarly for the parameter $TransB. The function returns 0 if the operation succeeded, 1 otherwise.
 "gsl_blas_dsymm($Side, $Uplo, $alpha, $A, $B, $beta, $C)"  This function computes the matrixmatrix product and sum C = \alpha A B + \beta C for $Side is $CblasLeft and C = \alpha B A + \beta C for $Side is $CblasRight, where the matrix $A is symmetric. When $Uplo is $CblasUpper then the upper triangle and diagonal of $A are used, and when $Uplo is $CblasLower then the lower triangle and diagonal of $A are used. The function returns 0 if the operation succeeded, 1 otherwise.
 "gsl_blas_dsyrk($Uplo, $Trans, $alpha, $A, $beta, $C)"  This function computes a rankk update of the symmetric matrix $C, C = \alpha A A^T + \beta C when $Trans is $CblasNoTrans and C = \alpha A^T A + \beta C when $Trans is $CblasTrans. Since the matrix $C is symmetric only its upper half or lower half need to be stored. When $Uplo is $CblasUpper then the upper triangle and diagonal of $C are used, and when $Uplo is $CblasLower then the lower triangle and diagonal of $C are used. The function returns 0 if the operation succeeded, 1 otherwise.
 "gsl_blas_dsyr2k($Uplo, $Trans, $alpha, $A, $B, $beta, $C)"  This function computes a rank2k update of the symmetric matrix $C, C = \alpha A B^T + \alpha B A^T + \beta C when $Trans is $CblasNoTrans and C = \alpha A^T B + \alpha B^T A + \beta C when $Trans is $CblasTrans. Since the matrix $C is symmetric only its upper half or lower half need to be stored. When $Uplo is $CblasUpper then the upper triangle and diagonal of $C are used, and when $Uplo is $CblasLower then the lower triangle and diagonal of $C are used. The function returns 0 if the operation succeeded, 1 otherwise.
 "gsl_blas_dtrmm($Side, $Uplo, $TransA, $Diag, $alpha, $A, $B)"  This function computes the matrixmatrix product B = \alpha op(A) B for $Side is $CblasLeft and B = \alpha B op(A) for $Side is $CblasRight. The matrix $A is triangular and op(A) = A, A^T, A^H for $TransA = $CblasNoTrans, $CblasTrans, $CblasConjTrans. When $Uplo is $CblasUpper then the upper triangle of $A is used, and when $Uplo is $CblasLower then the lower triangle of $A is used. If $Diag is $CblasNonUnit then the diagonal of $A is used, but if $Diag is $CblasUnit then the diagonal elements of the matrix $A are taken as unity and are not referenced. The function returns 0 if the operation succeeded, 1 otherwise.
 "gsl_blas_dtrsm($Side, $Uplo, $TransA, $Diag, $alpha, $A, $B)"  This function computes the inversematrix matrix product B = \alpha op(inv(A))B for $Side is $CblasLeft and B = \alpha B op(inv(A)) for $Side is $CblasRight. The matrix $A is triangular and op(A) = A, A^T, A^H for $TransA = $CblasNoTrans, $CblasTrans, $CblasConjTrans. When $Uplo is $CblasUpper then the upper triangle of $A is used, and when $Uplo is $CblasLower then the lower triangle of $A is used. If $Diag is $CblasNonUnit then the diagonal of $A is used, but if $Diag is $CblasUnit then the diagonal elements of the matrix $A are taken as unity and are not referenced. The function returns 0 if the operation succeeded, 1 otherwise.
 "gsl_blas_cgemm"
 "gsl_blas_csymm"
 "gsl_blas_csyrk"
 "gsl_blas_csyr2k "
 "gsl_blas_ctrmm"
 "gsl_blas_ctrsm"
 "gsl_blas_zgemm($TransA, $TransB, $alpha, $A, $B, $beta, $C)"  This function computes the matrixmatrix product and sum C = \alpha op(A) op(B) + \beta C where op(A) = A, A^T, A^H for $TransA = $CblasNoTrans, $CblasTrans, $CblasConjTrans and similarly for the parameter $TransB. The function returns 0 if the operation succeeded, 1 otherwise. $A, $B and $C are complex matrices
 "gsl_blas_zsymm($Side, $Uplo, $alpha, $A, $B, $beta, $C)"  This function computes the matrixmatrix product and sum C = \alpha A B + \beta C for $Side is $CblasLeft and C = \alpha B A + \beta C for $Side is $CblasRight, where the matrix $A is symmetric. When $Uplo is $CblasUpper then the upper triangle and diagonal of $A are used, and when $Uplo is $CblasLower then the lower triangle and diagonal of $A are used. $A, $B and $C are complex matrices. The function returns 0 if the operation succeeded, 1 otherwise.
 "gsl_blas_zsyrk($Uplo, $Trans, $alpha, $A, $beta, $C)"  This function computes a rankk update of the symmetric complex matrix $C, C = \alpha A A^T + \beta C when $Trans is $CblasNoTrans and C = \alpha A^T A + \beta C when $Trans is $CblasTrans. Since the matrix $C is symmetric only its upper half or lower half need to be stored. When $Uplo is $CblasUpper then the upper triangle and diagonal of $C are used, and when $Uplo is $CblasLower then the lower triangle and diagonal of $C are used. The function returns 0 if the operation succeeded, 1 otherwise.
 "gsl_blas_zsyr2k($Uplo, $Trans, $alpha, $A, $B, $beta, $C)"  This function computes a rank2k update of the symmetric matrix $C, C = \alpha A B^T + \alpha B A^T + \beta C when $Trans is $CblasNoTrans and C = \alpha A^T B + \alpha B^T A + \beta C when $Trans is $CblasTrans. Since the matrix $C is symmetric only its upper half or lower half need to be stored. When $Uplo is $CblasUpper then the upper triangle and diagonal of $C are used, and when $Uplo is $CblasLower then the lower triangle and diagonal of $C are used. The function returns 0 if the operation succeeded, 1 otherwise. $A, $B and $C are complex matrices and $beta is a complex number.
 "gsl_blas_ztrmm($Side, $Uplo, $TransA, $Diag, $alpha, $A, $B)"  This function computes the matrixmatrix product B = \alpha op(A) B for $Side is $CblasLeft and B = \alpha B op(A) for $Side is $CblasRight. The matrix $A is triangular and op(A) = A, A^T, A^H for $TransA = $CblasNoTrans, $CblasTrans, $CblasConjTrans. When $Uplo is $CblasUpper then the upper triangle of $A is used, and when $Uplo is $CblasLower then the lower triangle of $A is used. If $Diag is $CblasNonUnit then the diagonal of $A is used, but if $Diag is $CblasUnit then the diagonal elements of the matrix $A are taken as unity and are not referenced. The function returns 0 if the operation succeeded, 1 otherwise. $A and $B are complex matrices and $alpha is a complex number.
 "gsl_blas_ztrsm($Side, $Uplo, $TransA, $Diag, $alpha, $A, $B)"  This function computes the inversematrix matrix product B = \alpha op(inv(A))B for $Side is $CblasLeft and B = \alpha B op(inv(A)) for $Side is $CblasRight. The matrix $A is triangular and op(A) = A, A^T, A^H for $TransA = $CblasNoTrans, $CblasTrans, $CblasConjTrans. When $Uplo is $CblasUpper then the upper triangle of $A is used, and when $Uplo is $CblasLower then the lower triangle of $A is used. If $Diag is $CblasNonUnit then the diagonal of $A is used, but if $Diag is $CblasUnit then the diagonal elements of the matrix $A are taken as unity and are not referenced. The function returns 0 if the operation succeeded, 1 otherwise. $A and $B are complex matrices and $alpha is a complex number.
 "gsl_blas_chemm"
 "gsl_blas_cherk"
 "gsl_blas_cher2k"
 "gsl_blas_zhemm($Side, $Uplo, $alpha, $A, $B, $beta, $C)"  This function computes the matrixmatrix product and sum C = \alpha A B + \beta C for $Side is $CblasLeft and C = \alpha B A + \beta C for $Side is $CblasRight, where the matrix $A is hermitian. When Uplo is CblasUpper then the upper triangle and diagonal of A are used, and when Uplo is CblasLower then the lower triangle and diagonal of A are used. The imaginary elements of the diagonal are automatically set to zero.
 "gsl_blas_zherk($Uplo, $Trans, $alpha, $A, $beta, $C)"  This function computes a rankk update of the hermitian matrix $C, C = \alpha A A^H + \beta C when $Trans is $CblasNoTrans and C = \alpha A^H A + \beta C when $Trans is $CblasTrans. Since the matrix $C is hermitian only its upper half or lower half need to be stored. When $Uplo is $CblasUpper then the upper triangle and diagonal of $C are used, and when $Uplo is $CblasLower then the lower triangle and diagonal of $C are used. The imaginary elements of the diagonal are automatically set to zero. The function returns 0 if the operation succeeded, 1 otherwise. $A, $B and $C are complex matrices and $alpha and $beta are complex numbers.
 "gsl_blas_zher2k($Uplo, $Trans, $alpha, $A, $B, $beta, $C)"  This function computes a rank2k update of the hermitian matrix $C, C = \alpha A B^H + \alpha^* B A^H + \beta C when $Trans is $CblasNoTrans and C = \alpha A^H B + \alpha^* B^H A + \beta C when $Trans is $CblasConjTrans. Since the matrix $C is hermitian only its upper half or lower half need to be stored. When $Uplo is $CblasUpper then the upper triangle and diagonal of $C are used, and when $Uplo is $CblasLower then the lower triangle and diagonal of $C are used. The imaginary elements of the diagonal are automatically set to zero. The function returns 0 if the operation succeeded, 1 otherwise.
You have to add the functions you want to use inside the qw /put_funtion_here /. You can also write use Math::GSL::BLAS qw/:all/ to use all avaible functions of the module. Other tags are also avaible, here is a complete list of all tags for this module :
 "level1"
 "level2"
 "level3"
For more information on the functions, we refer you to the GSL offcial documentation: <http://www.gnu.org/software/gsl/manual/html_node/>
COPYRIGHT AND LICENSE
Copyright (C) 20082011 Jonathan ``Duke'' Leto and Thierry MoisanThis program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.