r8pbu
r8pbu,
a MATLAB code which
carries out some basic linear algebra operations on R8PBU matrices
(real 64 bit precision positive definite symmetric band upper format).
Licensing:
The computer code and data files described and made available on this web page
are distributed under
the GNU LGPL license.
Languages:
r8pbu 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:
r8pbu_test
linear_algebra,
MATLAB codes which
carry out various linear algebra operations for matrices
stored in a variety of formats.
Source Code:
-
i4_log_10.m,
returns the integer part of the logarithm base 10 of abs(X);
-
r8_uniform_01.m,
is a uniform random number generator;
-
r8ge_det.m,
computes the determinant of a factored R8GE matrix;
-
r8ge_fa.m,
factors an R8GE matrix;
-
r8ge_print.m,
prints an R8GE matrix;
-
r8ge_print_some.m,
prints some of an R8GE matrix;
-
r8pbu_cg.m,
uses the conjugate gradient method on a linear system with
an R8PBU matrix;
-
r8pbu_det.m,
computes the determinant of an R8PO matrix factored by
R8PBU_FA;
-
r8pbu_dif2.m,
returns the DIF2 matrix in R8PBU format.
-
r8pbu_fa.m,
factors an R8PBU matrix;
-
r8pbu_indicator.m,
returns an R8PBU indicator matrix;
-
r8pbu_ml.m,
computes A*x or A'*x after A has been factored by R8PBU_FA;
-
r8pbu_mv.m,
multiplies an R8PBU matrix times a vector;
-
r8pbu_print.m,
prints an R8PBU matrix;
-
r8pbu_print_some.m,
prints some of an R8PBU matrix;
-
r8pbu_random.m,
randomizes an R8PBU matrix;
-
r8pbu_res.m,
computes the residual R = B-A*X for R8PBU matrices.
-
r8pbu_sl.m,
solves an R8PBU linear system factored by R83P_FA;
-
r8pbu_sor.m,
applies the SOR iterative method to solve a linear system
with an R8PBU matrix;
-
r8pbu_to_r8ge.m,
copies an R8PBU matrix to an R8GE matrix;
-
r8pbu_zeros.m,
zeros an R8PBU 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_uniform_01.m,
returns a random R8VEC;
-
r8vec2_print_some.m,
prints some of a pair R8VEC's;
Last revised on 25 August 2022.