# network.indicators

##### Indicator Functions for Network Properties

Various indicators for properties of `network`

class objects.

##### Usage

```
has.loops(x)
is.bipartite(x)
is.directed(x)
is.hyper(x)
is.multiplex(x)
```

##### Arguments

- x
- an object of class
`network`

##### Details

These methods are the standard means of assessing the state of a `network`

object; other methods can (and should) use these routines in governing their own behavior. As such, improper setting of the associated attributes may result in unpleasantly creative results. (See the `edge.check`

argument to `add.edges`

for an example of code which makes use of these network properties.)

The functions themselves behave has follows:
`has.loops`

returns `TRUE`

iff `x`

is allowed to contain loops (or loop-like edges, in the hypergraphic case).
`is.bipartite`

returns `TRUE`

iff the `x`

has been explicitly bipartite-coded. Values of `bipartite=NULL`

, and `bipartite=FALSE`

will evaluate to `FALSE`

, numeric values of `bipartite>=0`

will evaluate to `TRUE`

. (The value `bipartite==0`

indicates that it is a bipartite network with a zero-sized first partition.) Note that `is.bipartite`

refers only to the storage properties of `x`

and how it should be treated by some algorithms; `is.bipartite(x)==FALSE`

it does *not* mean that `x`

cannot admit a bipartition!

`is.directed`

returns `TRUE`

iff the edges of `x`

are to be interpreted as directed.

`is.hyper`

returns `TRUE`

iff `x`

is allowed to contain hypergraphic edges.

`is.multiplex`

returns `TRUE`

iff `x`

is allowed to contain multiplex edges.

##### Value

`TRUE`

or `FALSE`

##### References

Butts, C. T. (2008). “network: a Package for Managing Relational Data in R.” *Journal of Statistical Software*, 24(2). http://www.jstatsoft.org/v24/i02/

##### See Also

`network`

, `get.network.attribute`

, `set.network.attribute`

, `add.edges`

##### Examples

```
g<-network.initialize(5) #Initialize the network
is.bipartite(g)
is.directed(g)
is.hyper(g)
is.multiplex(g)
has.loops(g)
```

*Documentation reproduced from package network, version 1.13.0, License: GPL (>= 2)*