r8ss

r8ss an Octave code which carries out some basic linear algebra operations on R8SS matrices (real 64 bit precision symmetric skyline format).

Licensing:

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

Languages:

r8ss is available in a C version and a C++ version and a Fortran90 version and a MATLAB version and an Octave version and a Python version.

Related Data and Programs:

r8ss_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 scaled uniform I4 between A and B.
• r8_uniform_01.m, returns a random R8 value;
• r8ge_mv.m, multiplies an R8GE matrix times a vector;
• r8ge_print.m, prints an R8GE matrix;
• r8ge_print_some.m, prints some of an R8GE matrix;
• r8ss_dif2.m, sets up an R8SS second difference matrix;
• r8ss_indicator.m, sets up an R8SS indicator matrix;
• r8ss_mv.m, multiplies an R8SS matrix times a vector;
• r8ss_print.m, prints an R8SS matrix;
• r8ss_print_some.m, prints some of an R8SS matrix;
• r8ss_random.m, randomizes an R8SS matrix;
• r8ss_to_r8ge.m, copies an R8SS matrix to an R8GE matrix;
• r8ss_zeros.m, zeros an R8SS matrix;
• r8vec_indicator1.m, sets an R8VEC to the indicator1 vector;
• r8vec_print.m, prints an R8VEC;
• r8vec2_print.m, prints a pair of R8VEC's.