zx8754 zx8754 - 16 days ago 5
R Question

Output Venn gList object and Network plot side-by-side

How can we plot Network plot (igraph package plot) and Venn diagram (VennDiagram gList object) side-by-side in one PDF page?

Tried to follow below solutions, didn't work:

Plot gList side by side

Plot 2 tmap objects side-by-side

Side-by-side Venn diagram using Vennerable

Here is an example, which plots them in two pages. I used

grid.newpage()
to make it plot in separate pages, otherwise it gets plotted on top of each other.

library(grid)
library(igraph)
library(VennDiagram)

#network graph object
relations <- data.frame(from=c("Bob", "Cecil", "Cecil", "David",
"David", "Esmeralda"),
to=c("Alice", "Bob", "Alice", "Alice", "Bob", "Alice"))
g <- graph_from_data_frame(relations, directed=TRUE)

# venn plot object
plotVenn <- venn.diagram(
list(A = 1:150, B = 121:170),
filename = NULL)
class(plotVenn)
# [1] "gList"

# output to PDF, outputs into 2 pages, I need 1 page 2 plots side-by-side
pdf("temp.pdf")

#network
igraph::plot.igraph(g)

#venn
grid.newpage()
grid.draw(plotVenn)

dev.off()


enter image description here

Answer

Taking inspiration from the first link above, you can "trick" your way out by making coexist a "regular" plot and a grid:

pdf("temp.pdf", )
layout(matrix(1:2, nrow=1))
igraph::plot.igraph(g)
plot.new()
pushViewport(viewport(layout = grid.layout(1, 2, widths=unit(c(0.5, 0.5), "npc"))))
pushViewport(viewport(layout.pos.col = 2))
grid.draw(plotVenn)
popViewport(0)
dev.off()

enter image description here