## Using pie charts as vertices in graph plots

### Description

More complex vertex images can be used to express addtional
information about vertices. E.g. pie charts can be used as vertices,
to denote vertex classes, fuzzy classification of vertices, etc.

### Details

The vertex shape ‘pie’ makes igraph draw a pie chart for every
vertex. There are some extra graphical vertex parameters that specify
how the pie charts will look like:

- pie
Numeric vector, gives the sizes of the pie slices.

- pie.color
A list of color vectors to use for the pies. If it
is a list of a single vector, then this is used for all pies. It
the color vector is shorter than the number of areas in a pie,
then it is recycled.

- pie.border
The color of the border line of the pie charts, in
the same format as `pie.color`

.

- pie.angle
The slope of shading lines, given as an angle in
degrees (counter-clockwise).

- pie.density
The density of the shading lines, in lines per
inch. Non-positive values inhibit the drawing of shading lines.

- pie.lty
The line type of the border of the slices.

### Author(s)

Gabor Csardi csardi.gabor@gmail.com

### See Also

`igraph.plotting`

, `plot.igraph`

### Examples

g <- make_ring(10)
values <- lapply(1:10, function(x) sample(1:10,3))
if (interactive()) {
plot(g, vertex.shape="pie", vertex.pie=values,
vertex.pie.color=list(heat.colors(5)),
vertex.size=seq(10,30,length=10), vertex.label=NA)
}

[Package

*igraph* version 1.2.4.1

Index]