r8ge
r8ge,
a MATLAB code which
carries out some basic linear algebra operations on R8GE matrices
(real 64 bit precision general MxN format).
Licensing:
The computer code and data files described and made available on this web page
are distributed under
the MIT license
Languages:
r8ge is available in
a C version and
a C++ version and
a FORTRAN90 version and
a MATLAB version and
a Python version.
Related Data and Programs:
r8col,
a MATLAB code which
contains utility routines for R8COL's, that is,
double precision real MxN arrays, considered as N column vectors,
each of length M. The data may be thought of as a matrix of
multiple columns, and many operations will be carried out columnwise.
r8crs,
a MATLAB code which
contains linear algebra routines for r8crs matrices
(real, 64 bit, Compressed Row Storage (CRS) format).
r8ge_test
r8row,
a MATLAB code which
contains utility routines for R8ROW's, that is,
double precision real MxN arrays, considered as M row vectors,
each of length N. The data may be thought of as a matrix of
multiple rows, and many operations will be carried out rowwise.
Source Code:
-
i4_log_10.m,
returns the integer part of the logarithm base 10 of abs(X);
-
i4vec_print.m,
prints an I4VEC;
-
r8_sign.m,
returns the sign of a double precision number;
-
r8_uniform_01.m,
is a uniform random number generator;
-
r8ge_cg.m,
applies the conjugate gradient method to a linear system stored
as an R8GE matrix.
-
r8ge_co.m,
factors an R8GE matrix and estimates its condition number;
-
r8ge_det.m,
computes the determinant of a factored R8GE matrix;
-
r8ge_dif2.m,
returns the second difference matrix as an R8GE matrix;
-
r8ge_dilu.m,
produces the diagonal incomplete LU factor of an R8GE matrix;
-
r8ge_fa.m,
factors an R8GE matrix;
-
r8ge_fs.m,
factors and solves an R8GE system;
-
r8ge_fss.m,
factors and solves multiple R8GE systems;
-
r8ge_hilbert.m,
returns the Hilbert matrix as an R8GE matrix;
-
r8ge_hilbert_inverse.m,
returns the inverse of the Hilbert matrix as an R8GE matrix;
-
r8ge_identity.m,
copies the identity matrix to an R8GE matrix;
-
r8ge_ilu.m,
produces the incomplete LU factors of an R8GE matrix;
-
r8ge_indicator.m,
returns an R8GE indicator matrix;
-
r8ge_inverse.m,
returns the inverse of an R8GE matrix;
-
r8ge_ml.m,
multiplies an R8GE matrix factored by R8GE_FA times a vector;
-
r8ge_mm.m,
multiplies two R8GE matrices;
-
r8ge_mtm.m,
computes C=A'*B for R8GE matrices;
-
r8ge_mtv.m,
multiplies a vector times an R8GE matrix;
-
r8ge_mu.m,
multiplies an R8GE matrix factored by R8GE_TRF times a vector;
-
r8ge_mv.m,
multiplies an R8GE matrix times a vector;
-
r8ge_plu.m,
produces the PLU factors of an R8GE matrix;
-
r8ge_poly.m,
computes the characteristic polynomial of an R8GE matrix;
-
r8ge_print.m,
prints an R8GE matrix;
-
r8ge_print_some.m,
prints some of an R8GE matrix;
-
r8ge_random.m,
returns a random R8GE matrix;
-
r8ge_res.m,
computes the residual of an R8GE linear system;
-
r8ge_sl.m,
solves a linear system factored by R8GE_FA;
-
r8ge_sl_it.m,
applies one step of iterative refinement to a factored linear system;
-
r8ge_to_r8vec.m,
converts an R8GE matrix to an R8VEC;
-
r8ge_transpose_print.m,
prints the transpose of an R8GE matrix;
-
r8ge_transpose_print_some.m,
prints some of the transpose of an R8GE matrix;
-
r8ge_trf.m,
factors an R8GE matrix;
-
r8ge_trs.m,
solves a system factored by R8GE_TRF;
-
r8ge_zeros.m,
zeros out space for an R8GE matrix.
-
r8vec_indicator1.m,
sets an R8VEC to the indicator1 vector;
-
r8vec_print.m,
prints an R8VEC;
-
r8vec_print_some.m,
prints some of an R8VEC;
-
r8vec_to_r8ge.m,
converts an R8VEC to an R8GE matrix;
-
r8vec2_print_some.m,
prints some of a pair R8VEC's;
Last revised on 17 February 2019.