event: Add an event layer to a twig object

In twig: For Streamlining Decision and Economic Evaluation Models using Grammar of Modeling

Add an event layer to a twig object

Description

This function creates an event layer that can be added to a twig object. The event layer defines the possible outcomes of an event, their probabilities, and the transitions between states.

Usage

event(name, options, probs, transitions)

Arguments

name	A character string representing the name of the event. It doesn't need to be quoted.
options	A character vector of possible outcomes for the event. They don't need to be included in quotes. One of these options must be none.
probs	A character vector of probability function names for each outcome. They don't need to be included in quotes. One of these can be leftover for the remaining probability.
transitions	A character vector of state transitions corresponding to each outcome. They don't need to be included in quotes. These could be event names or states if a states layer defined. One of these can be stay for the Markov state to remain the same.

Value

A list representing the event layer.

Examples

#' # Adding the event layer to a twig object
twig_obj <- twig() + event(name = event_progress, 
                           options = c(yes, none), 
                           probs = c(pProgress, leftover), 
                           transitions = c(Severe, stay))

event_layer <- event(name = "event_progress", 
                     options = c("yes", "none"), 
                     probs = c(pProgress, leftover), 
                     transitions = c("Severe", "stay"))

twig documentation built on April 12, 2025, 2:08 a.m.