r8ncf

r8ncf, an Octave code which carries out some basic linear algebra operations on R8NCF matrices (real 64 bit precision nonsymmetric coordinate format).

Licensing:

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

Languages:

r8ncf 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:

r8ncf_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);
• 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;
• r8ncf_dif2.m, returns an R8NCF second difference matrix;
• r8ncf_dif2_nz_num.m, counts the nonzeros in an R8NCF second difference matrix;
• r8ncf_dif2_rowcol.m, sets indexing for an R8NCF second difference matrix;
• r8ncf_indicator.m, returns an R8NCF indicator matrix;
• r8ncf_mtv.m, computes b=A'*x, where A is an R8NCF matrix.
• r8ncf_mv.m, computes b=A*x, where A is an R8NCF matrix.
• r8ncf_print.m, prints an R8NCF matrix.
• r8ncf_print_some.m, prints some of an R8NCF matrix.
• r8ncf_random.m, randomizes an R8NCF matrix.
• r8ncf_to_r8ge.m, converts an R8NCF matrix to R8GE format.
• r8ncf_zeros.m, zeros an R8NCF matrix.
• r8vec_indicator1.m, sets an R8VEC to the indicator1 vector;
• r8vec_print.m, prints an R8VEC;