r8ccs

r8ccs, a MATLAB code which carries out some basic linear algebra operations on R8CCS matrices, real Compressed Column Storage (Colptr, Row, Value) format.

Licensing:

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

Languages:

r8ccs 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:

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_np matrices (real, 64 bit, tridiagonal 3xn format, nonpivoting factorization).

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).

r8bb, a MATLAB library which contains linear algebra routines for r8bb matrices (real, 64 bit, border banded format).

r8blt, a MATLAB library which contains linear algebra routines for r8blt 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).

r8ccs_test

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 matrices (real, 64 bit, general nonpivoting format).

r8lt, a MATLAB library which contains linear algebra routines for r8ut 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 (sherman-morrison) 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 r8vm matrices (real, 64 bit, vandermonde format).

Source Code:

• i4_log_10.m, returns the integer part of the logarithm base 10 of abs(X);
• i4vec_print.m, prints an I4VEC;
• i4vec_search_binary_a.m, uses binary search on an ascending sorted I4VEC to find the occurrence of a given value;
• r8ccs_dif2.m, sets the second difference as an r8ccs matrix.
• r8ccs_get.m, gets an entry from an r8ccs matrix.
• r8ccs_ijk.m, gets the sparse index from the full indices in an r8ccs matrix.
• r8ccs_inc.m, increments an entry from an r8ccs matrix.
• r8ccs_indicator.m, returns an r8ccs indicator matrix;
• r8ccs_kij.m, gets the full indices from the sparse index in an r8ccs matrix.
• r8ccs_mtv.m, computes b=A'*x, where A is an r8ccs matrix;
• r8ccs_mv.m, computes b=A*x, where A is an r8ccs matrix;
• r8ccs_print.m, prints an r8ccs matrix;
• r8ccs_print_some.m, prints some of an r8ccs matrix;
• r8ccs_random.m, randomizes an r8ccs matrix;
• r8ccs_read.m, reads an r8ccs matrix from three files;
• r8ccs_read_size.m, reads the sizes associated with an r8ccs matrix stored in three files;
• r8ccs_set.m, sets an entry in an r8ccs matrix.
• r8ccs_to_r8ge.m, solves an r8ccs linear system;
• r8ccs_write.m, writes an r8ccs matrix to three files;
• r8ccs_zeros.m, zeros an r8ccs matrix;
• r8ge_print.m, prints an R8GE matrix;
• r8ge_print_some.m, prints some of an R8GE matrix;
• r8vec_print.m, prints an R8VEC;