# matrix.csr-class

##### Class "matrix.csr"

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

- Keywords
- classes

##### Objects from the Class

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

.
and coerced from various other formats. Coercion of integer scalars
and vectors into identity matrices and diagonal matrices respectively
is accomplished by `as(x,"matrix.diag.csr")`

which generates an
object that has all the rights and responsibilties of the matrix.csr class.
The default matrix.csr object is a scalar (1 by 1) matrix with element 0.

##### Slots

`ra`

:Object of class

`numeric`

, a real array of nnz elements containing the non-zero elements 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

- %*%
`signature(x = "matrix.csr", y = "matrix.csr")`

: ...- %*%
`signature(x = "matrix.csr", y = "matrix")`

: ...- %*%
`signature(x = "matrix.csr", y = "numeric")`

: ...- %*%
`signature(x = "matrix", y = "matrix.csr")`

: ...- %*%
`signature(x = "numeric", y = "matrix.csr")`

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

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

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

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

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

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

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

: ...- diag<-
`signature(x = "matrix.csr")`

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

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

: ...- solve
`signature(a = "matrix.csr")`

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

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

: ...

##### See Also

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