I met this problem before and my solution is to create more grids.
gl <- grid.layout(nrow=3, ncol=3, widths = c(1, 0.2, 1), heights = c(1, 0.2, 1))
grid.show.layout(gl)
Then you can plot your venn diagram on the corner grids.
문제
I'm trying to display 4 venn.diagramm plots in a grid. I need to increase the space between diagrams in order that my legends don't overlap with other diagrams (or be outside of the plots).
I tried to do so by playing with margin
in the function venn.diagram
but this lead to increase the distance between the diagrams and their respective subtitles (what is not good).
I have seen some questions related to mine (e.g. controlling the inner figure margin within grid.layout) but they didn't work in my case.
Here is my code:
library(VennDiagram)
library(grid)
library(gridBase)
library(lattice)
# data
l1 <- list(Deletion=1:1420, Insertion=967:2042)
l2 <- list(Deletion=1:502, Insertion=324:660)
l3 <- list(Deletion=1:142, Insertion=85:184)
l4 <- list(Deletion=1:161, Insertion=22:217)
venns <- list(Subtargets=l1, Targets=l2, Genes=l3, Promoters=l4)
# set up grid layout
gl <- grid.layout(nrow=2, ncol=2)
# setup viewports
vp.1 <- viewport(layout.pos.col=1, layout.pos.row=1)
vp.2 <- viewport(layout.pos.col=2, layout.pos.row=1)
vp.3 <- viewport(layout.pos.col=1, layout.pos.row=2)
vp.4 <- viewport(layout.pos.col=2, layout.pos.row=2)
# init layout
pushViewport(viewport(layout=gl))
for (i in 1:4){
# access the relevant viewport
vp <- paste("vp.", i, sep="")
pushViewport(get(vp))
# draw the venn diagram
temp <- venn.diagram(venns[[i]], fill = c("red", "green"), alpha = c(0.5, 0.5),
cex = 1,cat.fontface = 2, lty =2, filename = NULL, sub=names(venns)[i],
margin = 0.5, sub.pos = c(0.5, 0.78), sub.col="blue")
# plot the venn diagram on the viewport
grid.draw(temp)
# done with this viewport
popViewport()
}
Any idea? Maybe by increasing the margins between viewports without changing the parameters within wiewport?