abund.ch.prob {CTFS} | R Documentation

## Calculation of Probability of Change in Population size

### Description

The probability that N0 = N1 is computed.

### Usage

    abund.ch.prob(N0, N1, recrate, survrate)

### Arguments

`N0` | abundance in first census
`N1` | abundance in second census
`recrate` | number of recruits / N1
`survrate` | number of survivors / N0

### Details

See `CTFS.abundance` for details on the computation of abundance and associated functions.

This function is designed to be called from `abundance.change.calculation`. It can be used independently if the number of recruits and survivors are known. The probability returned is the sum of a biniomial (survivorship) and poisson (recruitment) distribution. The arguments can be vectors of any length. This function does not work with multi-dimensional arrays. To use if for these, use `abundance.change.calculation`

### Value

`prob` | vector of probabilities of same length as the arguments

### Author(s)

Rick Condit

### See Also

`CTFS.abundance`, `abundance.change`, `abundance.change.calculation`

[Package CTFS version 1.00 Index]