format_covariates: Format habitat covariate matrix

In James-Thorson/VAST: Vector-Autoregressive Spatio-Temporal (VAST) Model

Format habitat covariate matrix

Description

format_covariates formats an array used by Data_Fn for habitat (a.k.a. density) covariates

Usage

format_covariates(
  Lat_e,
  Lon_e,
  t_e,
  Cov_ep,
  Extrapolation_List,
  Spatial_List,
  FUN = mean,
  Year_Set = min(t_e):max(t_e),
  na.omit = "error"
)

Arguments

Lat_e	Latitude for covariate sample e
Lon_e	Longitude for covariate sample e
t_e	Time (e.g., year) for covariate sample e
Cov_ep	matrix of covariates
Spatial_List	Output from Spatial_Information_Fn, representing spatial location of knots
FUN	function used to aggregate observations associated with each knot-time combination
Year_Set	Set of times t_e used when generating Cov_xtp
na.omit	What to do when some knot-time combination has no observation. Options include "error" which throw an error, or "time-average" which fills in the average for other years with observations for each knot

Value

Tagged list of useful output

Cov_xtp

3-dimensional array for use in Data_Fn

var_p

a matrix summarizing the data-level variance, variance among knots, and lost variance when aggregating from data to knots for each covariate

James-Thorson/VAST documentation built on Feb. 9, 2025, 9:05 a.m.