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;