A class for sparse matrices stored in symmetric sparse row ('ssr') format.
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 matrix
signature(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
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