r8bb

r8bb, a MATLAB code which carries out some basic linear algebra operations on R8BB matrices (real 64 bit precision Border Banded format).

Licensing:

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

Languages:

r8bb 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:

r8bb_test

R83, a MATLAB library which contains linear algebra routines for R83 matrices (real, 64 bit, tridiagonal 3xN format).

R83_NP, a MATLAB library which contains linear algebra routines for R83 matrices (real, 64 bit, tridiagonal 3xN format, nonpivoting option).

R83P, a MATLAB library which contains linear algebra routines for R83P matrices (real, 64 bit, tridiagonal periodic format).

R83S, a MATLAB library which contains linear algebra routines for R83S matrices (real, 64 bit, tridiagonal scalar format).

R83T, a MATLAB library which contains linear algebra routines for R83T matrices (real, 64 bit, tridiagonal Mx3 format).

R83V, a MATLAB library which contains linear algebra routines for R83V matrices (real, 64 bit, tridiagonal three vector format).

R85, a MATLAB library which contains linear algebra routines for R85 matrices (real, 64 bit, pentadiagonal format).

R8BLT, a MATLAB library which contains linear algebra routines for RB8LT matrices (real, 64 bit, band lower triangular format).

R8BTO, a MATLAB library which contains linear algebra routines for R8BTO matrices (real, 64 bit, block Toeplitz format).

R8BUT, a MATLAB library which contains linear algebra routines for R8BUT matrices (real, 64 bit, band upper triangular format).

R8CB, a MATLAB library which contains linear algebra routines for R8CB matrices (real, 64 bit, Compressed Band format).

R8CBB, a MATLAB library which contains linear algebra routines for R8CBB matrices (real, 64 bit, Compressed Border Banded format).

R8CC, a MATLAB library which contains linear algebra routines for R8CC matrices (real, 64 bit, Compressed Column (Colptr,Row,Value) format).

R8CI, a MATLAB library which contains linear algebra routines for R8CI matrices (real, 64 bit, circulant format).

R8COL, a MATLAB library which contains utility routines for R8COL's, that is, double precision real MxN arrays, considered as N column vectors, each of length M. The data may be thought of as a matrix of multiple columns, and many operations will be carried out columnwise.

R8GB, a MATLAB library which contains linear algebra routines for R8GB matrices (real, 64 bit, General Banded format).

R8GD, a MATLAB library which contains linear algebra routines for R8GD matrices (real, 64 bit, general diagonal format).

R8GE, a MATLAB library which contains linear algebra routines for R8GE matrices (real, 64 bit, General format).

R8GE_NP, a MATLAB library which contains nonpivoting linear algebra routines for R8GE_NP matrices (real, 64 bit, General Nonpivoting format).

R8LT, a MATLAB library which contains linear algebra routines for R8LT matrices (real, 64 bit, lower triangular format).

R8LTT, a MATLAB library which contains linear algebra routines for R8LTT matrices (real, 64 bit, lower triangular Toeplitz format).

R8NCF, a MATLAB library which contains linear algebra routines for R8NCF matrices (real, 64 bit, nonsymmetric coordinate format).

R8PBL, a MATLAB library which contains linear algebra routines for R8PBL matrices (real, 64 bit, positive definite symmetric band lower format).

R8PBU, a MATLAB library which contains linear algebra routines for R8PBU matrices (real, 64 bit, positive definite symmetric band upper format).

R8PO, a MATLAB library which contains linear algebra routines for R8PO matrices (real, 64 bit, positive definite symmetric format).

R8PP, a MATLAB library which contains linear algebra routines for R8PP matrices (real, 64 bit, positive definite symmetric packed format).

R8RI, a MATLAB library which contains linear algebra routines for R8RI matrices (real, 64 bit, row indexed format).

R8ROW, a MATLAB library which contains utility routines for R8ROW's, that is, double precision real MxN arrays, considered as M row vectors, each of length N. The data may be thought of as a matrix of multiple rows, and many operations will be carried out rowwise.

R8S3, a MATLAB library which contains linear algebra routines for R8S3 matrices (real, 64 bit, SLAP triad (I,J,AIJ) format).

R8SD, a MATLAB library which contains linear algebra routines for R8SD matrices (real, 64 bit, symmetric diagonal format).

R8SM, a MATLAB library which contains linear algebra routines for R8SM matrices (real, 64 bit, A-u*v' format).

R8SP, a MATLAB library which contains linear algebra routines for R8SP matrices (real, 64 bit, SLAP triad (I,J,AIJ) format).

R8SR, a MATLAB library which carries out linear algebra operations for R8SR matrices (real, 64 bit, diagonal + compressed row offdiagonal format).

R8SS, a MATLAB library which carries out linear algebra operations for R8SS matrices (real, 64 bit, symmetric skyline format).

R8STO, a MATLAB library which contains linear algebra routines for R8STO matrices (real, 64 bit, symmetric Toeplitz N format).

R8TO, a MATLAB library which contains linear algebra routines for R8TO matrices (real, 64 bit, Toeplitz 2*N-1 format).

R8UT, a MATLAB library which contains linear algebra routines for R8UT matrices (real, 64 bit, upper triangular format).

R8UTT, a MATLAB library which contains linear algebra routines for R8UTT matrices (real, 64 bit, upper triangular Toeplitz format).

R8VM, a MATLAB library which contains linear algebra routines for R8UT matrices (real, 64 bit, Vandermonde format).

Source Code:

• i4_log_10.m, returns the integer part of the logarithm base 10 of abs(X);
• i4_uniform_ab.m, returns a random integer in a given range;
• r8_uniform_01.m, is a uniform random number generator;
• r8bb_add.m, adds a value to an entry in an R8BB matrix;
• r8bb_dif2.m, returns an R8BB second difference matrix;
• r8bb_fa.m, factors an R8BB matrix;
• r8bb_get.m, gets the value of an entry in an R8BB matrix;
• r8bb_indicator.m, returns an R8BB indicator matrix;
• r8bb_mtv.m, computes b=A'*x, where A is an R8BLT matrix.
• r8bb_mv.m, computes b=A*x, where A is an R8BLT matrix.
• r8bb_print.m, prints an R8BB matrix;
• r8bb_print_some.m, prints some of an R8BB matrix;
• r8bb_random.m, returns a random R8BB matrix;
• r8bb_set.m, sets one entry of an R8BB matrix;
• r8bb_sl.m, solves a linear system that was factored by R8BB_FA;
• r8bb_to_r8ge.m, copies an R8BB matrix to an R8GE matrix;
• r8bb_zeros.m, zeros an R8BB matrix;
• r8gb_fa.m, performs a LINPACK style PLU factorization of an R8GB matrix;
• r8gb_sl.m, solves a system factored by R8GB_FA;
• r8gb_to_r8vec.m, copies an R8GB matrix to an R8VEC;
• r8ge_fa.m, factors an R8GE matrix;
• r8ge_print.m, prints an R8GE matrix;
• r8ge_print_some.m, prints some of an R8GE matrix;
• r8ge_sl.m, solves a linear system factored by R8GE_FA;
• r8ge_to_r8vec.m, converts an R8GE matrix to an R8VEC;
• r8vec_indicator1.m, sets an R8VEC to the indicator1 vector;
• r8vec_print.m, prints an R8VEC;
• r8vec_print_some.m, prints some of an R8VEC;
• r8vec_to_r8gb.m, converts an R8VEC to an R8GB matrix;
• r8vec_to_r8ge.m, converts an R8VEC to an R8GE matrix;