在维恩图中的通用集中添加数字

Question

我要在通用设置中添加所需的数字VIII，如图所示。我们如何使用维恩图在R中做到这一点？另外，我们如何在R的库VennDiagram中建立交点关系？

我的代码：

library(VennDiagram)

# your data
SetA <- c('6 7 9 12','1','8','5','10')
SetB <- c('6 7 9 12','3','2','4','11','13')

# Generate plot
v <- venn.diagram(list(SetA=SetA, SetB=SetB),
                  fill = c("orange", "blue"),
                  alpha = c(0.5, 0.5), cat.cex = 1.5, cex=1.5,
                  filename=NULL)

# have a look at the default plot
grid.newpage()
grid.draw(v)

# have a look at the names in the plot object v
lapply(v,  names)
# We are interested in the labels
lapply(v, function(i) i$label)

# Over-write labels (5 to 7 chosen by manual check of labels)
# in SetA only
v[[5]]$label  <- paste(setdiff(SetA, SetB), collapse="\n")  
# in SetB only
v[[6]]$label <- paste(setdiff(SetB, SetA)  , collapse="\n")  
# intesection
v[[7]]$label <- paste(intersect(SetA, SetB), collapse="\n")  

# plot  
grid.newpage()
grid.draw(v)