# make_bipartite_graph: Create a bipartite graph In igraph: Network Analysis and Visualization

 is_bipartite R Documentation

## Create a bipartite graph

### Description

A bipartite graph has two kinds of vertices and connections are only allowed between different kinds.

### Usage

```is_bipartite(graph)

make_bipartite_graph(types, edges, directed = FALSE)

bipartite_graph(...)
```

### Arguments

 `graph` The input graph. `types` A vector giving the vertex types. It will be coerced into boolean. The length of the vector gives the number of vertices in the graph. When the vector is a named vector, the names will be attached to the graph as the `name` vertex attribute. `edges` A vector giving the edges of the graph, the same way as for the regular `graph` function. It is checked that the edges indeed connect vertices of different kind, according to the supplied `types` vector. The vector may be a string vector if `types` is a named vector. `directed` Whether to create a directed graph, boolean constant. Note that by default undirected graphs are created, as this is more common for bipartite graphs. `...` Passed to `make_bipartite_graph`.

### Details

Bipartite graphs have a `type` vertex attribute in igraph, this is boolean and `FALSE` for the vertices of the first kind and `TRUE` for vertices of the second kind.

`make_bipartite_graph` basically does three things. First it checks the `edges` vector against the vertex `types`. Then it creates a graph using the `edges` vector and finally it adds the `types` vector as a vertex attribute called `type`. `edges` may contain strings as vertex names; in this case, `types` must be a named vector that specifies the type for each vertex name that occurs in `edges`.

`is_bipartite` checks whether the graph is bipartite or not. It just checks whether the graph has a vertex attribute called `type`.

### Value

`make_bipartite_graph` returns a bipartite igraph graph. In other words, an igraph graph that has a vertex attribute named `type`.

`is_bipartite` returns a logical scalar.

### Author(s)

Gabor Csardi csardi.gabor@gmail.com

`graph` to create one-mode networks

### Examples

```
g <- make_bipartite_graph(rep(0:1, length.out=10), c(1:10))
print(g, v=TRUE)

```

igraph documentation built on July 20, 2022, 1:07 a.m.