r8ci

r8ci, an Octave code which carries out some basic linear algebra operations on R8CI matrices (real 64 bit precision circulant format).

Licensing:

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

Languages:

r8ci 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:

r8ci_test

linear_algebra, an Octave code which carries out various linear algebra operations for matrices stored in a variety of formats.

Source Code:

• c8_le_l2.m, ( X <= Y ) for C8 values and the L2 norm;
• c8vec_print.m, prints a C8 vector.
• c8vec_sort_a_l2.m, sorts a C8 vector by L2 norm;
• c8vec_unity.m, returns the N roots of unity;
• 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;
• r8ci_det.m, returns the determinant of an R8CI matrix;
• r8ci_dif2.m, returns the periodic second difference matrix in R8CI form.
• r8ci_eval.m, returns the eigenvalues of an R8CI matrix;
• r8ci_indicator.m, returns an R8CI indicator matrix;
• r8ci_mtv.m, multiplies a vector times an R8CI matrix;
• r8ci_mv.m, multiplies an R8CI matrix times a vector;
• r8ci_print.m, prints an R8CI matrix;
• r8ci_print_some.m, prints some of an R8CI matrix;
• r8ci_random.m, randomizes an R8CI matrix;
• r8ci_sl.m, solves an R8CI linear system;
• r8ci_to_r8ge.m, copies an R8CI matrix to an R8GE matrix;
• r8ci_zeros.m, zeros an R8CI 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;
• sort_heap_external.m, external sorts a list of items into ascending order;