patterns

Capture-recapture data, at an intermediate form in the inner
workings of <code>poptop</code>


For any capture-recapture data matrix with columns such as <code>c1</code>,
<code>c2</code> ... as binary indicators of capture or noncapture, running
<code>patterns</code> on the data appends a new column <code>y</code> that binds
<code>c1</code>, <code>c2</code>, ... together as a column of capture patterns.


Applies local log-linear capture-recapture models (LLLMs) for
closed populations, as described in the doctoral thesis of Zachary Kurtz.
The method is relevant when there are 3-5 capture occasions, with auxiliary
covariates available for all capture occasions.  As part of estimating the
number of missing population units, the method estimates the "rate of
missingness" as it varies over the covariate space.  In addition,
user-friendly functions are provided to recreate (approximately) the method
of Zwane and van der Heijden (2004), which applied the VGAM package
in a way that is closely related to LLLMs.

patterns: Collapse capture events into capture patterns (strings)

Description

Usage

Arguments