VennDiagram (version 1.2.0)

draw.triple.venn: Draw a Venn Diagram with Three Sets

Description

Creates a Venn diagram with three sets. Creates Euler diagrams when the dataset meets certain conditions.

Usage

draw.triple.venn(area1, area2, area3, n12, n23, n13, n123, category = rep("", 3), rotation = 1, reverse = FALSE, euler.d = TRUE, scaled = TRUE, lwd = rep(2, 3), 
lty = rep("solid", 3), col = rep("black", 3), fill = NULL, alpha = rep(0.5, 3), label.col = rep("black", 7), cex = rep(1, 7), fontface = rep("plain", 7), 
fontfamily = rep("serif", 7), cat.pos = c(-40, 40, 180), cat.dist = c(0.05, 0.05, 0.025), cat.col = rep("black", 3), cat.cex = rep(1, 3), cat.fontface = rep("plain", 3), 
cat.fontfamily = rep("serif", 3), cat.just = list(c(0.5, 1), c(0.5, 1), c(0.5, 0)), cat.default.pos = "outer", cat.prompts = FALSE, rotation.degree = 0, 
rotation.centre = c(0.5, 0.5), ind = TRUE, sep.dist = 0.05, offset = 0, list.order = 1:3, ...)

Arguments

area1

The size of the first set

area2

The size of the second set

area3

The size of the third set

n12

The size of the intersection between the first and the second set

n23

The size of the intersection between the second and the third set

n13

The size of the intersection between the first and the third set

n123

The size of the intersection between all three sets

category

A vector (length 3) of strings giving the category names of the sets

rotation

1 (default), 2, or 3 indicating clockwise rotation of the three sets from the default arrangement

reverse

Boolean indicating whether the diagram should be mirrored long the vertical axis or not

euler.d

Boolean indicating whether to draw Euler diagrams when conditions are met or not

scaled

Boolean indicating whether to scale circle sizes in certain Euler diagrams according to set sizes or not

lwd

A vector (length 3) of numbers giving the lwd of the circles' circumferences

lty

A vector (length 3) giving the lty of the circles' circumferences

col

A vector (length 3) giving the colours of the circles' circumferences

fill

A vector (length 3) giving the colours of the circles' areas

alpha

A vector (length 3) giving the alpha transparency of the circles' areas

label.col

A vector (length 7) giving the colours of the areas' labels

cex

A vector (length 7) giving the cex of the areas' labels

fontface

A vector (length 7) giving the fontface of the areas' labels

fontfamily

A vector (length 7) givibg the fontfamily of the areas' labels

cat.pos

A vector (length 3) giving the positions (in degrees) of the category names along the circles, with 0 (default) at the 12 o'clock location

cat.dist

A vector (length 3) giving the distances (in npc units) of the category names from the edges of the circles (can be negative)

cat.cex

A vector (length 3) giving the cex of the category names

cat.col

A vector (length 3) giving the colours of the category names

cat.fontface

A vector (length 3) giving the fontface of the category names

cat.fontfamily

A vector (length 3) giving the fontfamily of the category names

cat.just

List of 3 vectors of length 2 indicating horizontal and vertical justification of each category name

cat.default.pos

Either 'outer' or 'text' to specify the default location of category names (cat.pos and cat.dist are handled differently)

cat.prompts

Boolean indicating whether to display help text on category name positioning or not)

rotation.degree

Number of degrees to rotate the entire diagram

rotation.centre

A vector (length 2) indicating (x,y) of the rotation centre

ind

Boolean indicating whether the function is to automatically draw the diagram before returning the gList object or not

sep.dist

Number between 0 and 1 giving the distance between circles in certain Euler diagrams with mutually exclusive sets

offset

Number giving the amount of offset from the centre in certain Euler diagrams with inclusive sets

list.order

For internal use only

...

Additional arguments to be passed to or from other methods, including margin, which indicates amount of whitespace around the final diagram in npc units

Value

• Returns an object of class gList containing the grid objects that make up the diagram. Also displays the diagram in a graphical device unless specified with ind = FALSE. Grid::grid.draw can be used to draw the gList object in a graphical device.

Details

Euler diagrams are drawn for 19 special cases if euler.d == TRUE. Certain Euler diagrams make use of the scaled, sep.dist, or offset arguments specific to two-set Venn diagrams where appropriate. The function defaults to placing the three circles in a triangular arrangement with two sets on top and one set below. The circles correspond to area1, area2 and area3 in a clockwise fashion with area1 on the top left. N.B. General scaling for three-set Venn diagrams are disabled due to potentially misleading visual representation of the data. To re-enable, assign any value to variable overrideTriple.

Examples

# A simple three-set diagram
venn.plot <- draw.triple.venn(65, 75, 85, 35, 15, 25, 5, c("First", "Second", "Third"));

# A more complicated diagram
venn.plot <- draw.triple.venn(
	area1 = 65, 
	area2 = 75, 
	area3 = 85,
	n12 = 35,
	n23 = 15,
	n13 = 25,
	n123 = 5,
	category = c("First", "Second", "Third"),
	fill = c("blue", "red", "green"),
	lty = "blank",
	cex = 2,
	cat.cex = 2,
	cat.col = c("blue", "red", "green")
	);

# Demonstrating an Euler diagram
venn.plot <- draw.triple.venn(20, 40, 60, 0, 0, 0, 0, c("First", "Second", "Third"), sep.dist = 0.1, rotation.degree = 30);

# Writing to file
tiff(filename = "Single-set Venn diagram.tiff", compression = "lzw");
	
venn.plot <- draw.triple.venn(65, 75, 85, 35, 15, 25, 5, c("First", "Second", "Third"));

grid.draw(venn.plot);

dev.off();