r8cbb
r8cbb,
a MATLAB code which
carries out some basic linear algebra operations on R8CBB matrices
(real 64 bit precision compact border banded format).
Licensing:
The computer code and data files described and made available on this web page
are distributed under
the GNU LGPL license.
Languages:
r8cbb 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:
r8cbb_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);

i4_uniform_ab.m,
returns a random integer in a given range;

r8_uniform_01.m,
is a uniform random number generator;

r8cb_np_fa.m,
factors an R8CB linear system with no pivoting;

r8cb_np_sl.m,
solves an R8CB linear system;

r8cb_to_r8vec.m,
copies an R8CB matrix to an R8VEC;

r8cbb_add.m,
adds a value to an entry of an R8CBB matrix;

r8cbb_dif2.m,
returns the second difference matrix as an R8CBB matrix;

r8cbb_fa.m,
factors an R8CBB matrix;

r8cbb_get.m,
gets one entry of an R8CBB matrix;

r8cbb_indicator.m,
returns an R8CBB indicator matrix;

r8cbb_mtv.m,
multiplies a vector times an R8CBB matrix;

r8cbb_mv.m,
multiplies a vector times an R8CBB matrix;

r8cbb_print.m,
prints an R8CBB matrix;

r8cbb_print_some.m,
prints some of an R8CBB matrix;

r8cbb_random.m,
returns a random R8CBB matrix;

r8cbb_set.m,
sets one entry of an R8CBB matrix;

r8cbb_sl.m,
solves a linear system factored by R8CBB_FA;

r8cbb_to_r8ge.m,
converts an R8CBB matrix to R8GE format;

r8cbb_zeros.m,
zeros an R8CBB matrix;

r8ge_np_fa.m,
factors an R8GE matrix by nonpivoting Gaussian elimination;

r8ge_np_sl.m,
solves a linear system factored by R8GE_NP_FA;

r8ge_print.m,
prints an R8GE matrix;

r8ge_print_some.m,
prints some of an R8GE matrix;

r8ge_to_r8vec.m,
converts an R8GE matrix to an R8VEC;

r8vec_indicator1.m,
sets an R8VEC to the indicator1 vector;

r8vec_print.m,
prints an R8VEC;

r8vec_to_r8cb.m,
converts an R8VEC to an R8CB matrix;

r8vec_to_r8ge.m,
converts an R8VEC to an R8GE matrix;
Last revised on 21 August 2022.