r8po

r8po, an Octave code which carries out some basic linear algebra operations on R8PO matrices (real 64 bit precision positive definite symmetric format).

Licensing:

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

Languages:

r8po 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:

r8po_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);
• 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_r8po.m, converts an R8GE matrix to an R8PO matrix;
• r8po_det.m, computes the determinant of an R8PO matrix factored by R8PO_FA;
• r8po_dif2.m, returns the second difference matrix in R8PO format.
• r8po_fa.m, factors an R8PO matrix;
• r8po_indicator.m, returns an R8PO indicator matrix;
• r8po_inverse.m, returns the inverse of an R8PO matrix;
• r8po_ml.m, computes A*x after A has been factored by R8PO_FA;
• r8po_mm.m, multiplies two R8PO matrices;
• r8po_mv.m, multiplies an R8PO matrix times a vector;
• r8po_print.m, prints an R8PO matrix;
• r8po_print_some.m, prints some of an R8PO matrix;
• r8po_random.m, randomizes an R8PO matrix;
• r8po_sl.m, solves an R8PO linear system factored by R83P_FA;
• r8po_to_r8ge.m, copies an R8PO matrix to an R8GE matrix;
• r8po_zeros.m, zeros an R8PO matrix;
• r8ut_print.m, prints an R8UT matrix;
• r8ut_print_some.m, prints some of an R8UT matrix;
• r8vec_indicator1.m, sets an R8VEC to the indicator1 vector;
• r8vec_print.m, prints an R8VEC;