Class "matrix.ssr" - Sparse Matrices in [S]ymmetric [S]parse [R]ow Format
A class for sparse matrices stored in symmetric sparse row ('ssr') format.
class
Objects can be created by calls of the form new("matrix.ssr", ...).
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 row order. Thus, if i<j, all elements of row i precede elements from row j. The order of elements within the rows is immaterial.ja:: Object of class integer, an integer array of nnz elements containing the column 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 row in the arrays ra' and ja'. Thus ia[i]' indicates the position in the arrays ra' and ja' where the ith row begins. The last, (n+1)st, element of ia' indicates where the n+1 row would start, if it existed.dimension:: Object of class integer, dimension of the matrixsignature(x = "matrix.ssr"): ...signature(x = "matrix.ssr"): ...signature(x = "matrix.ssr"): ...signature(x = "matrix.ssr"): ...signature(x = "matrix.ssr"): ...matrix.csr-class
ssr <- as.matrix.ssr(diag(c(2,3,5,7))) ssr