Venn Diagram in R to show character labels

Question

I'm very new to R and trying to create a 4-dimensional Venn diagram with a data which contains all categorical variables. For instance, if i have the data below and I want to create a Venn Diagram in R to show the word "hello" at the intersection of A & B instead of the counts and percentages, how do i do that? I used the code ggVennDigram(x) after creating the list below and it gave me the counts instead of the actual data labels.

x=list()                        
x$A=as.character(c("hello"))
x$B=as.character(c("hello", "how", "are"))
x$C=as.character(c("how", "You"))
x$D=as.character(c("me", "her", "they"))

Hi, can you please add the name of the library to your question. Also please include the code you tried. That will make it a better question and more useful to future readers. — Elin, Jun 09 '21 at 11:20
library(ggplot) library(VennDiagram) x=list() x$A=as.character(c("hello")) x$B=as.character(c("hello", "how", "are")) x$C=as.character(c("how", "You")) x$D=as.character(c("me", "her", "they")) ggVennDiagram(x) — Afia A, Jun 09 '21 at 13:52

Pete Kittinun · Accepted Answer · 2021-06-09T03:51:04.430

The graph cannot be label by default. This is solution with some hack. (modified from Venn Diagram with Item labels)

library(VennDiagram)
library(stringr)
library(purrr)

# Generate plot
v <- venn.diagram(x,
                  fill = c("orange", "blue", "red", "green"),
                  filename=NULL)

# Calculate overlap site
overlaps <- calculate.overlap(x)
overlaps <- overlaps[str_sort(names(overlaps), numeric = TRUE)] # sort base on numeric value

# Apply name to global variable
# Index of venn diagram start at calculate.overlaps + 8. You have to find the index value by yourself for (3,5,6,7,.. venn)
walk2(seq(overlaps) +8, seq(overlaps),  
      function(x,y) {v[[x]]$label <<- paste0(overlaps[[y]], collapse = "\n")})

# Draw plot
grid.draw(v)

Thank you, this is very helpful. I'm very new to R so i will digest the code a bit and come back with any questions. — Afia A, Jun 09 '21 at 13:55

Venn Diagram in R to show character labels

1 Answers1