gplots (version 2.7.4)

venn: Plot a Venn diagram

Description

Plot Venn diagrams for up to 5 sets

Usage

venn(data, universe=NA, small=0.7, showSetLogicLabel=FALSE,
     simplify=FALSE, show.plot=TRUE)

Arguments

data

data to be plotted (see below)

universe

??

small

Character size of group labels

showSetLogicLabel

Logical flag indicating whether the internal group label should be displayed

simplify

Logical flag indicating whether unobserved group should be omitted.

show.plot

Logical flag indicating whether the plot should be displayed. If false, simply returns the group count matrix.

Value

• A matrix of all possible sets of groups, and the observed numer of items beloinging to each set of groups is returned invisibly. The fist column contains observed counts, subsequent columns contain 0-1 indicators of group membership.

Details

data should be either a named list of vectors containing indexes of group members (1, 2, 3,..) , or a data frame containing indicator variables (TRUE, FALSE, TRUE, ..) for group membership. Group names will be taken from the component vector or column names.

Examples

##
## Example using a list of item indexes  belonging to the
## specified group.
##
A<- 1:20
B<- 1:20
C<- 2:20
D<- 3:21
input<-list(A,B,C,D)
input

venn(input)

##
## Example using a data frame of indicator columns
##
A<- as.logical(rbinom(100, 1, 0.2))
B<- as.logical(rbinom(100, 1, 0.7))
C<- as.logical(rbinom(100, 1, 0.2))
D<- as.logical(rbinom(100, 1, 0.1))
input<-data.frame(A,B,C,D)
venn(input)


## Omit un-observed groupings
tmp <- venn(input, simplify=TRUE)

## show details
tmp

## Show internal binary group labels
venn(input, showSetLogicLabel=TRUE)

## Specify universe
venn(input, universe=NULL, showSetLogicLabel=TRUE)