families: Additional families

In tinyVAST: Multivariate Spatio-Temporal Models using Structural Equations

Additional families

Description

Additional families compatible with tinyVAST().

Usage

delta_lognormal(link1, link2 = "log", type = c("standard", "poisson-link"))

delta_gamma(link1, link2 = "log", type = c("standard", "poisson-link"))

Arguments

link1	Link for first part of delta/hurdle model.
link2	Link for second part of delta/hurdle model.
type	Delta/hurdle family type. "standard" for a classic hurdle model. "poisson-link" for a Poisson-link delta model (Thorson 2018).
link	Link.

Value

A list with elements common to standard R family objects including family, link, linkfun, and linkinv. Delta/hurdle model families also have elements delta (logical) and type (standard vs. Poisson-link).

References

Poisson-link delta families:

Thorson, J.T. 2018. Three problems with the conventional delta-model for biomass sampling data, and a computationally efficient alternative. Canadian Journal of Fisheries and Aquatic Sciences, 75(9), 1369-1382. \Sexpr[results=rd]{tools:::Rd_expr_doi("10.1139/cjfas-2017-0266")}

Poisson-link delta families:

Thorson, J.T. 2018. Three problems with the conventional delta-model for biomass sampling data, and a computationally efficient alternative. Canadian Journal of Fisheries and Aquatic Sciences, 75(9), 1369-1382. \Sexpr[results=rd]{tools:::Rd_expr_doi("10.1139/cjfas-2017-0266")}

tinyVAST documentation built on April 4, 2025, 2:43 a.m.