predictor_spec {IxPopDyMod}

Specify how a single predictor should be used

Description

Specify how a single predictor should be used

Usage

predictor_spec(pred, first_day_only = TRUE)

Arguments

pred

String indicating where to get predictor data. Can be one of:

• A string in the "pred" column in the predictors table. In this case, the predictor value passed to the containing transition's fun is the corresponding value of that predictor in the table.

• A string that matches at least one life stage name via regex. In this case, the value passed to the containing transition's fun is the sum of the population sizes of all matched life stages.

first_day_only

Boolean indicating whether to repeat the predictor data value from the first day of a transition when evaluating it (TRUE case), or to use the range of predictor data over the duration of a transition (FALSE case). FALSE is only valid for transitions with "duration" as the transition_type, because "probability" type transitions only last one day. A value of FALSE also requires the name parameter to be a value in the predictors table "pred" column, not a tick life stage.

Value

a predictor_spec list-based object