r8sm

r8sm, a MATLAB code which carries out some basic linear algebra operations on R8SM matrices (real 64 bit precision Sherman-Morrison A-u*v format).

Licensing:

The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.

Languages:

r8sm 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:

r8sm_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 an I4;
• r8_uniform_01.m, returns a unit pseudorandom R8;
• r8ge_fa.m, factors an R8GE matrix;
• r8ge_ml.m, multiplies an R8GE matrix factored by R8GE_FA times a vector;
• r8ge_print.m, prints an R8GE matrix;
• r8ge_print_some.m, prints some of an R8GE matrix;
• r8ge_sl.m, solves a linear system factored by R8GE_FA;
• r8sm_indicator.m, returns the indicator matrix as an R8SM matrix.
• r8sm_ml.m, multiplies an R8SM matrix that has been factored by R8GE_FA times a vector;
• r8sm_mtv.m, multiplies a vector times an R8SM matrix;
• r8sm_mv.m, multiplies an R8SM matrix times a vector;
• r8sm_print.m, prints an R8SM matrix;
• r8sm_print_some.m, prints some of an R8SM matrix;
• r8sm_random.m, randomizes an R8SM matrix;
• r8sm_sl.m, solves an R8SM linear system;
• r8sm_to_r8ge.m, copies an R8SM matrix to an R8GE matrix;
• r8sm_zeros.m, zeros an R8SM matrix;
• r8vec_indicator1.m, sets an R8VEC to the indicator vector;
• r8vec_print.m, prints an R8VEC;
• r8vec2_print_some.m, prints some of a pair of R8VEC's.