| matrix.ssc-class {SparseM} | R Documentation |
A new class for sparse matrices stored in symmetric sparse column format
Objects can be created by calls of the form new("matrix.ssc", ...).
ra:numeric, a real array of nnz elements containing the non-zero
elements of the lower triangular part of A, stored in column order. Thus, if i<j, all elements
of column i precede elements from column j. The order of elements
within the column is immaterial.ja:integer, an integer array of nnz elements containing the row
indices of the elements stored in `ra'.ia:integer, an integer array of n+1 elements containing pointers to
the beginning of each column in the arrays `ra' and `ja'. Thus
`ia[i]' indicates the position in the arrays `ra' and `ja'
where the ith column begins. The last, (n+1)st, element of `ia'
indicates where the n+1 column would start, if it existed.
dimension:integer, dimension of the matrix signature(x = "matrix.ssc"): ... signature(x = "matrix.ssc"): ... signature(x = "matrix.ssc"): ... signature(x = "matrix.ssc"): ... signature(x = "matrix.ssc"): ...