matrix.ssc-class {SparseM}R Documentation

Class "matrix.ssc"

Description

A new class for sparse matrices stored in symmetric sparse column 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"): ...

See Also

matrix.csr-class


[Package SparseM version 0.54 Index]