# matrix.ssr-class

##### Class "matrix.ssr"

A new class for sparse matrices stored in symmetric sparse row format

- Keywords
- classes

##### Objects from the Class

Objects can be created by calls of the form `new("matrix.ssr", ...)`

.

##### 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 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

##### Methods

- as.matrix.csc
`signature(x = "matrix.ssr")`

: ...- as.matrix.csr
`signature(x = "matrix.ssr")`

: ...- as.matrix.ssr
`signature(x = "matrix.ssr")`

: ...- as.matrix
`signature(x = "matrix.ssr")`

: ...- dim
`signature(x = "matrix.ssr")`

: ...

##### See Also

*Documentation reproduced from package SparseM, version 1.78, License: GPL (>= 2)*