st_to_ccs

st_to_ccs, a MATLAB code which converts information describing a sparse matrix from sparse triplet (ST) format to Compressed Column Storage (CCS).

Licensing:

The computer code and data files made available on this web page are distributed under the MIT license

Languages:

st_to_ccs is available in a C version and a C++ version and a FORTRAN90 version and a MATLAB version.

Related Data and Programs:

ccs, a dataset directory which contains examples of the Compressed Column Storage (CCS) sparse matrix file format;

ccs_io, a MATLAB code which reads and writes sparse linear systems stored in the Compressed Column Storage (CCS) format.

ccs_to_st, a MATLAB code which converts a sparse matrix from Compressed Column Storage (CCS) to sparse triplet (ST) format.

hbsmc, a dataset directory which contains the Harwell Boeing Sparse Matrix Collection;

st, a data directory which contains examples of the Sparse Triplet (ST) format, a sparse matrix file format, storing just (I,J,A(I,J)), and using zero-based indexing.

st_io, a MATLAB code which reads and writes sparse linear systems stored in the ST "sparse triplet" Sparse Matrix format.

st_to_ccs_test

wathen, a MATLAB code which compares storage schemes (full, banded, sparse triplet) and solution strategies (Linpack full, Linpack banded, conjugate gradient (CG)) for linear systems involving the Wathen matrix, which can arise when solving a problem using the finite element method (FEM).

Source Code:

• ccs_mv.m computes a matrix-vector product for a sparse matrix in CCS format.
• ccs_print.m prints a sparse matrix in CCS format.
• i4vec_dec.m, decrements an I4VEC.
• i4vec_inc.m, increments an I4VEC.
• i4vec_write.m writes an I4VEC file.
• i4vec2_compare.m compares entries of an I4VEC2.
• i4vec2_sort_a.m ascending sorts a vector of pairs of integers.
• i4vec2_sorted_unique_count.m counts unique elements in a sorted I4VEC2.
• i4vec2_sorted_uniquely.m returns unique elements from a sorted I4VEC2.
• r8_uniform_01.m returns a pseudorandom R8.
• r8vec_uniform_01.m returns a pseudorandom R8VEC
• r8vec_write.m writes an R8VEC file.
• sort_heap_external.m externally sorts a list of items into ascending order.
• st_data_read.m reads the data of an ST file.
• st_header_print.m prints the header of an ST file.
• st_header_read.m reads the header of an ST file.
• st_mv.m computes a matrix-vector product for a sparse matrix in ST format.
• st_print.m prints a sparse matrix in ST format.
• st_to_ccs_index.m creates CCS indices from ST data.
• st_to_ccs_size.m sizes CCS indexes based on ST data.
• st_to_ccs_values.m creates CCS values from ST data.
• wathen_st.m returns a version of the Wathen matrix.
• wathen_st_size.m returns the size of a Wathen matrix.