classMembership: Class Membership Probability for Mixture Models

In openCR: Open Population Capture-Recapture

Class Membership Probability for Mixture Models

Description

Finite mixture models treat class membership as a latent random variable. The probability of an individual's membership in each class may be inferred retrospectively from the relative likelihoods.

Usage

## S3 method for class 'openCR'
classMembership(object, fullCH = NULL, ...)

Arguments

object	fitted model of class openCR
fullCH	capthist object (optional)
...	other arguments (not used)

Details

It is assumed that the input model includes finite mixture terms (h2 or h3).

As the detection histories are saved in compressed (“squeezed”) form in openCR objects the original animal identifiers are lost and the order of animals may change. These may be restored by providing fullCH.

No class can be assigned from a CJS model for animals detected only in the final session.

Value

Matrix with one row per individual and columns for each class and the class number of the most likely class.

Note

In earlier versions openCR.fit always computed class membership and saved it in component ‘posterior’ of the fitted model. classMembership replaces that functionality.

See Also

openCR.fit, squeeze

Examples

## Not run: 
jch <- join(ovenCH)   
fit <- openCR.fit(ovenCH, model=p~h2)
classMembership(fit, jch)

## End(Not run)

openCR documentation built on Oct. 30, 2024, 9:18 a.m.