R: Class "matrix.ssc"

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 1.77 Index]