DESCRIPTION

Package: SPAS
Type: Package
Title: Stratified-Petersen Analysis System
Version: 2025.2.1
Date: 2025-02-01
Authors@R: person(given = c("Carl", "James"),
                    family = "Schwarz",
                    role = c("aut", "cre"),
                    email = "cschwarz.stat.sfu.ca@gmail.com")
LinkingTo:
    TMB,
    RcppEigen
Imports:
    checkmate,
    MASS,
    Matrix,
    msm,
    numDeriv,
    plyr,
    reshape2,
    TMB (>= 1.7.15),
    utils
Description: The Stratified-Petersen Analysis System (SPAS) is designed
    to estimate abundance in two-sample capture-recapture experiments 
    where the capture and recaptures are stratified. This is a generalization
    of the simple Lincoln-Petersen estimator.
    Strata may be defined in time or in space or both, 
    and the s strata in which marking takes place 
    may differ from the t strata in which recoveries take place.
    When s=t, SPAS reduces to the method described by 
    Darroch (1961) <doi:10.2307/2332748>.
    When s<t, SPAS implements the methods described in
    Plante, Rivest, and Tremblay (1988) <doi:10.2307/2533994>.
    Schwarz and Taylor (1998) <doi:10.1139/f97-238> describe
    the use of SPAS in estimating return of salmon stratified by
    time and geography. 
    A related package, BTSPAS, deals with temporal stratification where 
    a spline is used to model the distribution of the population 
    over time as it passes the second capture location.
    This is the R-version of the (now obsolete) standalone Windows 
    program of the same name.
License: GPL (>=2)
RoxygenNote: 7.3.2
Suggests: knitr,
    rmarkdown
VignetteBuilder: knitr
Encoding: UTF-8