r8ut

r8ut, an Octave code which carries out some basic linear algebra operations on R8UT matrices (real 64 bit precision upper 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:

r8ut 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:

r8ut_test

linear_algebra, an Octave code which carries 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);
• r8ge_print.m, prints an R8GE matrix;
• r8ge_print_some.m, prints some of an R8GE matrix;
• r8ge_random.m, returns a random R8GE matrix;
• r8ge_to_r8ut.m, converts an R8GE matrix to an R8UT matrix;
• r8ut_det.m, computes the determinant of an R8UT matrix;
• r8ut_indicator.m, returns an R8UT indicator matrix;
• r8ut_inverse.m, returns the inverse of an R8UT matrix;
• r8ut_mm.m, computes the product A*B of two R8UT matrices.
• r8ut_mtm.m, computes the product A*B of two R8UT matrices.
• r8ut_mtv.m, multiplies a vector times an R8UT matrix;
• r8ut_mv.m, multiplies an R8UT matrix times a vector;
• r8ut_print.m, prints an R8UT matrix;
• r8ut_print_some.m, prints some of an R8UT matrix;
• r8ut_random.m, randomizes an R8UT matrix;
• r8ut_sl.m, solves an R8UT linear system A*x=b;
• r8ut_slt.m, solves an R8UT linear system A'*x=b;
• r8ut_to_r8ge.m, converts an R8UT matrix to an R8GE matrix;
• r8ut_zeros.m, zeros out space for an R8UT matrix.
• r8vec_indicator1.m, sets an R8VEC to the indicator1 vector;
• r8vec_print.m, prints an R8VEC;