plus: Add two count objects

Description Usage Arguments Details Author(s) Examples

Description

Adds two count objects

Usage

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## 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

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

a+b

untb documentation built on May 20, 2017, 6:03 a.m.

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