# Add two count objects

### Description

Adds two count objects

### Usage

1 2 3 4 | ```
## S3 method for class 'count'
a + b
## S3 method for class 'census'
a + b
``` |

### Arguments

`a,b` |
objects of class |

### 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

1 2 3 4 |