plus: Add two count objects

In RobinHankin/untb: Ecological Drift under the UNTB

Add two count objects

Description

Adds two count objects

Usage

## S3 method for class 'count'
a + b
## S3 method for class 'census'
a + b

Arguments

a,b	objects of class count

Details

Consider count objects a and b. Then a+b is a count object that records the number of each species in a and b combined. It is as though the organisms in the surveys were pooled.

Census objects are coerced to count objects, added, then the result coerced to a count object.

The operation is commutative and associative.

Author(s)

Robin K. S. Hankin, based on an R-help tip from Gabor Grothendiek

Examples

a <- count(c(dogs=4,pigs=0,slugs=5))
b <- count(c(slugs=4,hogs=1,frogs=19))

a+b

RobinHankin/untb documentation built on Aug. 23, 2023, 1:27 a.m.