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]