eulergram-compose: Compose Euler Diagrams

In eulerr: Area-Proportional Euler and Venn Diagrams

Compose Euler Diagrams

Description

Arrange two eulergram objects side-by-side or stacked, building up multi-panel layouts with operator syntax. Compositions can be nested arbitrarily, e.g. (p1 | p2) / p3.

Usage

## S3 method for class 'eulergram'
e1 | e2

## S3 method for class 'eulergram'
e1 / e2

Arguments

e1, e2

eulergram objects, typically returned by plot.euler().

Details

| arranges the two plots horizontally; / stacks them vertically. The result is itself an eulergram, so further composition chains naturally.

Consecutive operators of the same direction are flattened into a single row or column of equally sized panels. Thus p1 | p2 | p3 | p4 produces one row of four equal-width panels rather than a lopsided nest of binary splits. Use parentheses (or mix | and /) to force sub-groups: in (p1 | p2) / p3, p3 spans the full bottom row while p1 and p2 split the top row equally.

The gap between adjacent plots is controlled by the composition$spacing entry of eulerr_options(), which must be a grid::unit() and defaults to grid::unit(1, "lines").

Value

An eulergram containing the composed layout.

See Also

plot.euler(), eulerr_options()

Examples

p1 <- plot(euler(c(A = 1, B = 8, "A&B" = 1)))
p2 <- plot(euler(c(A = 1, C = 1, "A&C" = 1)))

p1 | p2
p1 / p2

p3 <- plot(euler(c(X = 3, Y = 2, "X&Y" = 1)))
(p1 | p2) / p3

eulerr documentation built on Aug. 22, 2026, 1:09 a.m.