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# Visualize Graphs in Notebooks

We are excited to announce that you can now use Graphviz to visualize directed and undirected graphs in RAI notebooks. Just provide node and edge relations, and the notebook will render the graph.

You can use attributes to determine the style and layout of the graph. Subgraphs allow finer grained control.

## Input

A module containing the following:

`:node:`

a unary relation of identifiers (usually strings or integers) to use as node ids.`:edge:`

a binary relation of edges as (`from`

,`to`

) pairs of node ids.

Here is an example, using a small family tree to generate a graph. We have defined the nodes and edges as below.

```
def nodes = "grandparent"
def edges = {
("grandparent", "parent A");
("grandparent", "parent B");
}
module attributes
def node = "fontname", "Helvetica"
end
module subgraphs["parents"]
def node = {"parent A"; "parent B"}
def edge = "parent B", "child"
module attribute
def node = {("color", "lightgrey"); ("style", "filled")}
def graph = "bgcolor", "lightblue"
end
end
module subgraphs["children"]
def parent = "parents"
def node = "child"
end
module graph
def node = nodes
def edge = edges
def attribute = attributes
def subgraph = subgraphs
end
def output = graphviz[graph]
```

When run in the RAI notebook, the following graph is generated:

Please refer to our Visualization Library (display) for further information.