mixedSSA

Functions

This package currently contains a two functions, update_dist and plot_updated_dist, that allows the user to update and plot the parameters of their chosen movement distribution from the fitted values of an ISSA model (using glmmTMB).

Currently the package supports updating the following step-length distributions:

• gamma
• exponential
• half-normal
• log normal

And the following turn angle distributions:

• Von Mises
• NOT SUPPORTED YET: uniform

Vignettes

• There is one vignette contained within this package that includes simple examples of how to fit an ISSA using glmmTMB and interpret and plot the fitted model using this package. To view this vignette, run vignette("using_mixedssa", package = "mixedSSA"). But make sure you installed mixedSSA as instructed below in order for this to work.
• It may also be helpful to look at the vignettes association with Fieberg Lab's methods paper: Modelling individual variability in habitat selection and movement using integrated step-selection analysis:
  • Using MixedSSA to Update Movement Distribution Parameters from ISSA models
  • Delta-method for standard error calculation

Installing

devtools::install_github("smthfrmn/mixedSSA", build_vignettes = TRUE)