无法在R中使用igraph正确绘制图形

Question

Given a data frame df as below:

df
v1             v2
tom            ben
lily           dick
ben            lily
ben            dick
.....

I tried to plot a network graph to linkage two names if they are in the same row, such as tom and ben, lily and dick,ben and lily and so on.

Besides that, I also have a data frame df_size to indicate the vertex size:

df_size
v1            v2
tom           10
lily          3
ben           1
dick          2
...

The vertex size should be proportional to their corresponding value in v2 .

And the last data frame is to classify them into groups and the color of the vertex should be the same if they are from the same group.

df_colour
v1        v1
tom       A
lily      B
ben       A
dick      A

Now I have tried this code:

g = graph.data.frame(df)
plot(g,vertex.size = df_size$v2 )

But get a very bad result:

Now I'd like to set the edge length and color of vertex properly, and remove the arrow. Do you have any idea to solve it? Thank you in advance!

Answer 1

Add to the plot function the commands vertex.label.cex and vertex.label.degree . Try with this:

plot(g, vertex.size=8, vertex.color = rainbow(10, .8, .8, alpha= .8),
vertex.label.color = "black", vertex.label.cex = 0.4, vertex.label.degree = -pi/2,
edge.arrow.size = 0.3, edge.arrow.width = 0.4, edge.color = "black")