| matrix.ssc-class {SparseM} | R Documentation |
Class "matrix.ssc" - Sparse Matrices in [S]ymmetric [S]parse [C]olumn Format
Description
A class for sparse matrices stored in symmetric sparse column ('ssc') format.
Objects from the Class
Objects can be created by calls of the form new("matrix.ssc", ...).
Slots
ra:Object of class
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:Object of class
integer, an integer array of nnz elements containing the row indices of the elements stored in ‘ra’.ia:Object of class
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:Object of class
integer, dimension of the matrix
Methods
- as.matrix.csc
signature(x = "matrix.ssc"): ...- as.matrix.csr
signature(x = "matrix.ssc"): ...- as.matrix.ssr
signature(x = "matrix.ssc"): ...- as.matrix
signature(x = "matrix.ssc"): ...- dim
signature(x = "matrix.ssc"): ...