Venn

在线画韦恩图(Draw venn diagram online)网站:

用R包画韦恩图：

install.packages("VennDiagram")

T<-venn.diagram(list(A=A,B=B),filename=NULL
,lwd=1,lty=2
,col=c('red','green'),fill=c('red','green')
,cat.col=c('red','green')
,rotation.degree=90)
grid.draw(T)

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library(VennDiagram)

A = 1:150
B = c(121:170,300:320)
C = c(20:40,141:200)
Length_A<-length(A)
Length_B<-length(B)
Length_C<-length(C)
Length_AB<-length(intersect(A,B))
Length_BC<-length(intersect(B,C))
Length_AC<-length(intersect(A,C))
Length_ABC<-length(intersect(intersect(A,B),C))

T<-venn.diagram(list(A=A,B=B,C=C),filename=NULL
,lwd=1,lty=2,col=c('red','green','blue')
,fill=c('red','green','blue')
,cat.col=c('red','green','blue')
,reverse=TRUE)
grid.draw(T)

-------------------------------------------
library(VennDiagram)
draw.pairwise.venn(area1=Length_A,area2=Length_B,cross.area=Length_AB
,category=c('A','B'),lwd=rep(1,1),lty=rep(2,2)
,col=c('red','green'),fill=c('red','green')
,cat.col=c('red','green') )

-------------------------------------------
library(VennDiagram)
draw.triple.venn(area1=Length_A, area2=Length_B, area3=Length_C
,n12=Length_AB, n23=Length_BC, n13=Length_AC, n123=Length_ABC
,category = c('A','B','C')
,col=c('red','green','blue'),fill=c('red','green','blue')
,cat.col=c('red','green','blue')
,reverse = FALSE)
-------------------------------------------

## scaled venn diagram

library(VennDiagram)
draw.pairwise.venn(area1=2000,area2=200,cross.area=20
,category=c('A','B'),lwd=rep(1,1),lty=rep(2,2)
,col=c('red','green'),fill=c('red','green')
,cat.col=c('red','green') )

-------------------------------------------

install.packages("venneuler")

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library(venneuler)
library("venneuler")
vd <- venneuler(c(A=0.3, B=0.3, C=1.1, "A&B"=0.1, "A&C"=0.2, "B&C"=0.1 ,"A&B&C"=0.1))
plot(vd)

-------------------------------------------
library("venneuler")
vd <- venneuler(c(A=18700, B=8, "A&B"=377))
plot(vd)
-------------------------------------------

文氏图（韦恩图，venn图）的基本概念：

https://www.lucidchart.com/pages/venn-diagram

https://www.mathsisfun.com/sets/venn-diagrams.html

Venn diagram glossary

Set	A collection of things. Given the versatility of Venn Diagrams, the things can really be anything. The things may be called items, objects, members or similar terms.
Union	All items in the sets.
Intersection	The items that overlap in the sets. Sometimes called a subset.
Symmetric difference of two sets	Everything but the intersection.
Absolute complement	Everything not in the set.
Relative complement	In one set but not the other.
Scaled Venn Diagram	Also called Area Proportional. The circles (or other shapes) are sized by their proportional representation of the whole.
Reuleaux Triangle	Shape formed from the intersection of three circulars or shapes, such as in a Venn Diagram.
Set notations	The concepts illustrated in Venn Diagrams are expressed with mathematical notations such as those representing sets and subsets (in brackets), unions (with a U-like symbol) and intersections (with an upside-down U symbol.)
Set theory	The longstanding branch of mathematics dealing with sets.

其它画韦恩图的工具软件(Other tools)：

eulerAPE: Drawing Area-Proportional Euler and Venn Diagrams

http://www.eulerdiagrams.org/eulerAPE/