r8cb
r8cb,
a MATLAB code which
carries out some basic linear algebra operations on R8CB matrices
(real 64 bit precision compact 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:
r8cb 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:
r8cb_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;
-
r8cb_det.m,
returns the determinant of an R8CB matrix;
-
r8cb_dif2t.m,
returns the second difference matrix as an R8CB matrix;
-
r8cb_indicator.m,
returns an R8CB indicator matrix;
-
r8cb_ml.m,
computes A*x or A'*x after A has been factored by R8CB_NP_FA;
-
r8cb_mtv.m,
multiplies a vector times an R8CB matrix;
-
r8cb_mv.m,
multiplies an R8CB matrix times a vector;
-
r8cb_np_fa.m,
factors an R8CB linear system with no pivoting;
-
r8cb_np_sl.m,
solves an R8CB linear system;
-
r8cb_print.m,
prints an R8CB matrix;
-
r8cb_print_some.m,
prints some of an R8CB matrix;
-
r8cb_random.m,
randomizes an R8CB matrix;
-
r8cb_to_r8ge.m,
copies an R8CB matrix to an R8GE matrix;
-
r8cb_to_r8vec.m,
copies an R8CB matrix to an R8VEC;
-
r8cb_zeros.m,
zeros an R8CB matrix;
-
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;
-
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;
-
r8vec2_print.m,
prints a pair R8VEC's;
Last revised on 20 August 2022.