r8blt

r8blt, an Octave code which carries out some basic linear algebra operations on R8BLT matrices (real 64 bit precision band lower triangular format).

Licensing:

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

Languages:

r8blt 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:

r8blt_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;
• r8blt_det.m, returns the determinant of an R8BLT matrix;
• r8blt_indicator.m, returns an R8BLT indicator matrix;
• r8blt_mtv.m, multiplies a vector times an R8BLT matrix;
• r8blt_mv.m, multiplies an R8BLT matrix times a vector;
• r8blt_print.m, prints an R8BLT matrix;
• r8blt_print_some.m, prints some of an R8BLT matrix;
• r8blt_random.m, randomizes an R8BLT matrix;
• r8blt_sl.m, solves A*x=b, where A is an R8BLT matrix;
• r8blt_slt.m, solves A'*x=b, where A is an R8BLT matrix;
• r8blt_to_r8ge.m, copies an R8BLT matrix to an R8GE matrix;
• r8blt_zeros.m, zeros an R8BLT 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;