VennDiagram (version 1.6.9)

draw.quad.venn: Draw a Venn Diagram with Four Sets

Description

Creates a Venn diagram with four sets.

Usage

draw.quad.venn(area1, area2, area3, area4, n12, n13, n14, n23, n24, n34, n123, n124,
	n134, n234, n1234, category = rep("", 4), lwd = rep(2, 4), lty = rep("solid", 4),
	col = rep("black", 4), fill = NULL, alpha = rep(0.5, 4),
	label.col = rep("black", 15), cex = rep(1, 15), fontface = rep("plain", 15),
	fontfamily = rep("serif", 15), cat.pos = c(-15, 15, 0, 0),
	cat.dist = c(0.22, 0.22, 0.11, 0.11), cat.col = rep("black", 4),
	cat.cex = rep(1, 4), cat.fontface = rep("plain", 4), 
	cat.fontfamily = rep("serif", 4), cat.just = rep(list(c(0.5, 0.5)), 4),
	rotation.degree = 0, rotation.centre = c(0.5, 0.5), ind = TRUE, ...)

Arguments

area1

The size of the first set

area2

The size of the second set

area3

The size of the third set

area4

The size of the fourth set

n12

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

n13

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

n14

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

n23

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

n24

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

n34

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

n123

The size of the intersection between the first, second and third sets

n124

The size of the intersection between the first, second and fourth sets

n134

The size of the intersection between the first, third and fourth sets

n234

The size of the intersection between the second, third and fourth sets

n1234

The size of the intersection between all four sets

category

A vector (length 4) of strings giving the category names of the sets

lwd

A vector (length 4) of numbers giving the line width of the circles' circumferences

lty

A vector (length 4) giving the dash pattern of the circles' circumferences

col

A vector (length 4) giving the colours of the circles' circumferences

fill

A vector (length 4) giving the colours of the circles' areas

alpha

A vector (length 4) giving the alpha transparency of the circles' areas

label.col

A vector (length 15) giving the colours of the areas' labels

cex

A vector (length 15) giving the size of the areas' labels

fontface

A vector (length 15) giving the fontface of the areas' labels

fontfamily

A vector (length 15) giving the fontfamily of the areas' labels

cat.pos

A vector (length 4) giving the positions (in degrees) of the category names along the circles, with 0 (default) at 12 o'clock

cat.dist

A vector (length 4) giving the distances (in npc units) of the category names from the edges of the circles (can be negative)

cat.cex

A vector (length 4) giving the size of the category names

cat.col

A vector (length 4) giving the colours of the category names

cat.fontface

A vector (length 4) giving the fontface of the category names

cat.fontfamily

A vector (length 4) giving the fontfamily of the category names

cat.just

List of 4 vectors of length 2 indicating horizontal and vertical justification of each category name

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

...

Additional arguments to be passed, 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

The function defaults to placing the ellipses so that area1 corresponds to lower left, area2 corresponds to lower right, area3 corresponds to middle left and area4 corresponds to middle right. Refer to the example below to see how the 31 partial areas are ordered. Arguments with length of 15 (label.col, cex, fontface, fontfamily) will follow the order in the example.

Examples

# Reference four-set diagram
venn.plot <- draw.quad.venn(
	area1 = 72,
	area2 = 86,
	area3 = 50,
	area4 = 52,
	n12 = 44,
	n13 = 27,
	n14 = 32,
	n23 = 38,
	n24 = 32,
	n34 = 20,
	n123 = 18,
	n124 = 17,
	n134 = 11,
	n234 = 13,
	n1234 = 6,
	category = c("First", "Second", "Third", "Fourth"),
	fill = c("orange", "red", "green", "blue"),
	lty = "dashed",
	cex = 2,
	cat.cex = 2,
	cat.col = c("orange", "red", "green", "blue")
	);

# Writing to file
tiff(filename = "Quad_Venn_diagram.tiff", compression = "lzw");
grid.draw(venn.plot);
dev.off();