add_reactevt: Define the modifications to other events, costs, utilities,...

In WARDEN: Workflows for Health Technology Assessments in R using Discrete EveNts

Define the modifications to other events, costs, utilities, or other items affected by the occurrence of the event

Description

Define the modifications to other events, costs, utilities, or other items affected by the occurrence of the event

Usage

add_reactevt(.data = NULL, name_evt, input)

Arguments

.data	Existing data for event reactions
name_evt	Name of the event for which reactions are defined.
input	Expressions that define what happens at the event, using functions as defined in the Details section

Details

There are a series of objects that can be used in this context to help define the event reactions.

The following functions may be used to define event reactions within this add_reactevt() function: modify_item() | Adds & Modifies items/flags/variables for future events (does not consider sequential) modify_item_seq() | Adds & Modifies items/flags/variables for future events in a sequential manner new_event() | Adds events to the vector of events for that patient modify_event() | Modifies existing events by changing their time

Apart from the items defined with add_item(), we can also use standard variables that are always defined within the simulation: curtime | Current event time (numeric) prevtime | Time of the previous event (numeric) cur_evtlist | Named vector of events that is yet to happen for that patient (named numeric vector) evt | Current event being processed (character) i | Patient being iterated (character) simulation | Simulation being iterated (numeric)

The model will run until curtime is set to Inf, so the event that terminates the model should modify curtime and set it to Inf.

The user can use extract_from_reactions function on the output to obtain a data.frame with all the relationships defined in the reactions in the model.

Value

A named list with the event name, and inside it the substituted expression saved for later evaluation

Examples

add_reactevt(name_evt = "start",input = {})
add_reactevt(name_evt = "idfs",input = {modify_item(list("fl.idfs"= 0))})

WARDEN documentation built on April 11, 2025, 5:41 p.m.