# Graph Attributes

Where possible, GraphRecipes will adopt attributes from Plots.jl to format visualizations. For example, the `linewidth`

attribute from Plots.jl has the same effect in GraphRecipes. In order to give the user control over the layout of the graph visualization, GraphRecipes provides a number of keyword arguments (attributes). Here we describe those attributes alongside their default values.

Attribute | Aliases | Default | Description |
---|---|---|---|

dim | 2 | The number of dimensions in the visualization. | |

T | Float64 | The data type for the coordinates of the graph nodes. | |

curves | true | Whether or not edges are curved. If `curves == true`, then the edge going from node $s$ to node $d$ will be defined by a cubic spline passing through three points: (i) node $s$, (ii) a point `p` that is distance `curvature_scalar` from the average of node $s$ and node $d$ and (iii) node $d$. | |

curvature_scalar | curvaturescalar, curvature | 0.05 | A scalar that defines how much edges curve, see `curves` for more explanation. |

root | :top | For displaying trees, choose from `:top`, `:bottom`, `:left`, `:right`. If you choose `:top`, then the tree will be plotted from the top down. | |

node_weights | nodeweights | nothing | The weight of the nodes given by a list of numbers. If `node_weights != nothing`, then the size of the nodes will be scaled by the `node_weights` vector. |

names | [] | Names of the nodes given by a list of objects that can be parsed into strings. If the list is smaller than the number of nodes, then GraphRecipes will cycle around the list. | |

fontsize | 7 | Font size for the node labels and the edge labels. | |

nodeshape | node_shape | :hexagon | Shape of the nodes, choose from `:hexagon`, `:circle`, `:ellipse`, `:rect` or `:rectangle`. |

nodesize | node_size | 0.1 | The size of nodes in the plot coordinates. Note that if `names` is not empty, then nodes will be scaled to fit the labels inside them. |

nodecolor | marker_color | 1 | The color of the nodes. If `nodecolor` is an integer, then it will be taken from the current color pallette. Otherwise, the user can pass any color that would be recognised by the Plots `color` attribute. |

x, y, z | x | nothing | The coordinates of the nodes. |

method | :stress | The method that GraphRecipes uses to produce an optimal layout, choose from `:spectral`, `:sfdp`, `:circular`, `:shell`, `:stress`, `:spring`, `:tree`, `:buchheim`, `:arcdiagram` or `:chorddiagram`. See [NetworkLayout](https://github.com/JuliaGraphs/NetworkLayout.jl) for further details. | |

func | get(_graph_funcs, method, by_axis_local_stress_graph) | A layout algorithm that can be passed in by the user. | |

shorten | shorten_edge | 0.0 | An amount to shorten edges by. |

axis_buffer | axisbuffer | 0.2 | Increase the `xlims` and `ylims`/`zlims` of the plot. Can be useful if part of the graph sits outside of the default view. |

layout_kw | Dict{Symbol,Any}() | A list of keywords to be passed to the layout algorithm, see [NetworkLayout](https://github.com/JuliaGraphs/NetworkLayout.jl) for a list of keyword arguments for each algorithm. | |

edgewidth | edge_width, ew | (s, d, w) -> 1 | The width of the edge going from $s$ to node $d$ with weight $w$. |

edgelabel | edge_label, el | nothing | A dictionary of `(s, d) => label`, where `s` is an integer for the source node, `d` is an integer for the destiny node and `label` is the desired label for the given edge. Alternatively the user can pass a vector or a matrix describing the edge labels. If you use a vector or matrix, then either `missing`, `false`, `nothing`, `NaN` or `""` values will not be displayed. In the case of multigraphs, triples can be used to define edges. |

edgelabel_offset | edgelabeloffset, elo | 0.0 | The distance between edge labels and edges. |

self_edge_size | selfedgesize, ses | 0.1 | The size of self edges. |

edge_label_box | edgelabelbox, edgelabel_box, elb | true | A box around edge labels that avoids intersections between edge labels and the edges that they are labeling. |

## Aliases

Certain keyword arguments have aliases, so GraphRecipes "does what you mean, not what you say".

So for example, `nodeshape=:rect`

and `node_shape=:rect`

are equivalent. To see the available aliases, type `GraphRecipes.graph_aliases`

. If you are unhappy with the provided aliases, then you can add your own:

```
using GraphRecipes, Plots
push!(GraphRecipes.graph_aliases[:nodecolor],:nc)
# These two calls produce the same plot, modulo some randomness in the layout.
plot(graphplot([0 1; 0 0], nodecolor=:red), graphplot([0 1; 0 0], nc=:red))
```

(Automatically generated: 2020-05-21T15:12:01.229)