r8pbl

r8pbl, a MATLAB code which carries out some basic linear algebra operations on R8PBL matrices (real 64 bit precision positive definite symmetric band lower format).

Licensing:

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

Languages:

r8pbl 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:

r8pbl_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.
• r8pbl_dif2.m, returns an R8PBL second difference matrix;
• r8pbl_indicator.m, returns an R8PBL indicator matrix;
• r8pbl_mv.m, computes b=A*x, where A is an R8PBL matrix;
• r8pbl_print.m, prints an R8PBL matrix;
• r8pbl_print_some.m, prints some of an R8PBL matrix;
• r8pbl_random.m, randomizes an R8PBL matrix;
• r8pbl_to_r8ge.m, copies an R8PBL matrix to an R8GE matrix;
• r8pbl_zeros.m, zeros an R8PBL matrix;
• r8vec_indicator1.m, sets an R8VEC to the indicator1 vector;
• r8vec_print.m, prints an R8VEC;