Use this if you are using igraph from R

layout_with_fr {igraph} | R Documentation |

Place vertices on the plane using the force-directed layout algorithm by Fruchterman and Reingold.

```
layout_with_fr(
graph,
coords = NULL,
dim = 2,
niter = 500,
start.temp = sqrt(vcount(graph)),
grid = c("auto", "grid", "nogrid"),
weights = NULL,
minx = NULL,
maxx = NULL,
miny = NULL,
maxy = NULL,
minz = NULL,
maxz = NULL,
coolexp,
maxdelta,
area,
repulserad,
maxiter
)
with_fr(...)
```

`graph` |
The graph to lay out. Edge directions are ignored. |

`coords` |
Optional starting positions for the vertices. If this argument
is not |

`dim` |
Integer scalar, 2 or 3, the dimension of the layout. Two dimensional layouts are places on a plane, three dimensional ones in the 3d space. |

`niter` |
Integer scalar, the number of iterations to perform. |

`start.temp` |
Real scalar, the start temperature. This is the maximum amount of movement alloved along one axis, within one step, for a vertex. Currently it is decreased linearly to zero during the iteration. |

`grid` |
Character scalar, whether to use the faster, but less accurate grid based implementation of the algorithm. By default (“auto”), the grid-based implementation is used if the graph has more than one thousand vertices. |

`weights` |
A vector giving edge weights. The |

`minx` |
If not |

`maxx` |
Similar to |

`miny` |
Similar to |

`maxy` |
Similar to |

`minz` |
Similar to |

`maxz` |
Similar to |

`coolexp, maxdelta, area, repulserad` |
These arguments are not supported from igraph version 0.8.0 and are ignored (with a warning). |

`maxiter` |
A deprecated synonym of |

`...` |
Passed to |

See the referenced paper below for the details of the algorithm.

This function was rewritten from scratch in igraph version 0.8.0.

A two- or three-column matrix, each row giving the coordinates of a vertex, according to the ids of the vertex ids.

Gabor Csardi csardi.gabor@gmail.com

Fruchterman, T.M.J. and Reingold, E.M. (1991). Graph Drawing by
Force-directed Placement. *Software - Practice and Experience*,
21(11):1129-1164.

`layout_with_drl`

, `layout_with_kk`

for
other layout algorithms.

Other graph layouts:
`add_layout_()`

,
`component_wise()`

,
`layout_as_bipartite()`

,
`layout_as_star()`

,
`layout_as_tree()`

,
`layout_in_circle()`

,
`layout_nicely()`

,
`layout_on_grid()`

,
`layout_on_sphere()`

,
`layout_randomly()`

,
`layout_with_dh()`

,
`layout_with_gem()`

,
`layout_with_graphopt()`

,
`layout_with_kk()`

,
`layout_with_lgl()`

,
`layout_with_mds()`

,
`layout_with_sugiyama()`

,
`layout_()`

,
`merge_coords()`

,
`norm_coords()`

,
`normalize()`

```
# Fixing ego
g <- sample_pa(20, m=2)
minC <- rep(-Inf, vcount(g))
maxC <- rep(Inf, vcount(g))
minC[1] <- maxC[1] <- 0
co <- layout_with_fr(g, minx=minC, maxx=maxC,
miny=minC, maxy=maxC)
co[1,]
plot(g, layout=co, vertex.size=30, edge.arrow.size=0.2,
vertex.label=c("ego", rep("", vcount(g)-1)), rescale=FALSE,
xlim=range(co[,1]), ylim=range(co[,2]), vertex.label.dist=0,
vertex.label.color="red")
axis(1)
axis(2)
```

[Package *igraph* version 1.3.5 Index]