Using pie charts as vertices in graph plots and specify a color for each factor

Question

suppose i have a variable x which gives the sizes of the pie slices as follows:

x

[[1]]

Celebrity    Corporate 
        2            6 

[[2]]

Celebrity    Government  Unverified 
        2             1           4 

[[3]]

Celebrity    Media   Unverified 
        5        1            6 

My code was here:

plot(my_graph, vertex.shape="pie", vertex.pie=x, vertex.pie.color=???, vertex.label=NA, edge.arrow.mode=0)

My question is how could I specify colors for Celebrity, Media, Corporate, Government, and Unverified manually and plot my_graph using pie charts as vertices.

Answer 1

Having made said comment above, you can set the individual colors for each vertex with V().

Riffing off the pie igraph example itself:

library(igraph)

g <- graph.ring(10)

values <- lapply(1:10, function(x) c(sample(1:10,3),0,0))

# make some unique bits
values[[7]][5] = 6
values[[9]][4] = 3

# default for all
V(g)$pie.color=list(heat.colors(5))

# make one stand out
V(g)[6]$pie.color=list(topo.colors(5))

# set.seed() keeps the vertices in the same place each plot
set.seed(1492)

plot(g,
     vertex.shape="pie", 
     vertex.pie=values,
     vertex.size=seq(10, 30, length=10), 
     vertex.label=NA)

It should be straightforward to adapt your needs with that sample.