lsyMatrix-class {Matrix} | R Documentation |

## Symmetric Dense Logical Matrices

### Description

The `"lsyMatrix"`

class is the class of symmetric, dense logical
matrices in non-packed storage and `"lspMatrix"`

is the class of
of these in packed storage. In the packed form, only the upper
triangle or the lower triangle is stored.

### Objects from the Class

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

.

### Slots

`uplo`

:Object of class `"character"`

. Must be
either "U", for upper triangular, and "L", for lower triangular.

`x`

:Object of class `"logical"`

. The logical
values that constitute the matrix, stored in column-major order.

`Dim`

,`Dimnames`

:The dimension (a length-2
`"integer"`

) and corresponding names (or `NULL`

), see the
`Matrix`

class.

`factors`

:Object of class `"list"`

. A named
list of factorizations that have been computed for the matrix.

### Extends

Both extend classes `"ldenseMatrix"`

and
`"symmetricMatrix"`

, directly; further, class
`"Matrix"`

and others, *in*directly. Use
`showClass("lsyMatrix")`

, e.g., for details.

### Methods

Currently, mainly `t()`

and coercion methods (for
`as(.)`

; use, e.g.,
`showMethods(class="dsyMatrix")`

for details.

### See Also

`lgeMatrix`

, `Matrix`

,
`t`

### Examples

```
(M2 <- Matrix(c(TRUE, NA, FALSE, FALSE), 2, 2)) # logical dense (ltr)
str(M2)
# can
(sM <- M2 | t(M2)) # "lge"
as(sM, "symmetricMatrix")
str(sM <- as(sM, "packedMatrix")) # packed symmetric
```

[Package

*Matrix* version 1.5-3

Index]