r8ri
r8ri,
a MATLAB code which
carries out some basic linear algebra operations on R8RI matrices
(real 64 bit precision row indexed format).
Licensing:
The computer code and data files described and made available on this web page
are distributed under
the GNU LGPL license.
Languages:
r8ri 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:
r8ri_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_print.m,
prints an R8GE matrix;

r8ge_print_some.m,
prints some of an R8GE matrix;

r8ge_to_r8ri.m,
converts an R8GE matrix to an R8RI matrix;

r8ge_to_r8ri_size.m,
determines the size of an R8RI version of an R8GE matrix.

r8ri_dif2.m,
returns the second difference matrix as an R8RI matrix;

r8ri_indicator.m,
returns the indicator matrix as an R8RI matrix;

r8ri_mtv.m,
computes b=A'*x, where A is an R8RI matrix;

r8ri_mv.m,
computes b=A*x, where A is an R8RI matrix;

r8ri_print.m,
prints an R8RI matrix;

r8ri_print_some.m,
prints some of an R8RI matrix;

r8ri_random.m,
randomizes an R8RI matrix;

r8ri_to_r8ge.m,
converts an R8RI matrix to an R8GE matrix;

r8ri_zeros.m,
zeros an R8RI matrix;

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

r8vec_print.m,
prints an R8VEC;
Last revised on 26 August 2022.