callback_int: Internal item callback utilities

In ricu: Intensive Care Unit Data with R

Internal item callback utilities

Description

The utility function add_concept() is exported for convenience when adding external datasets and integrating concepts that require other concepts. While this could be solves by defining a rec_concpt, in some scenarios this might not be ideal, as it might be only required that itm implementations for certain data sources require additional information. Examples for this include vasopressor rates which might rely on patient weight, and blood cell counts when expressed as ratio. For performance reasons, the pulled in concept is internally cached, as this might be used unchanged many times, when loading several concepts that need to pull in the given concept. Persistence of cache is session-level and therefore this utility is intended to be used somewhat sparingly.

Usage

add_concept(x, env, concept, var_name = concept, aggregate = NULL)

add_weight(x, env, var_name = "weight")

calc_dur(x, val_var, min_var, max_var, grp_var = NULL)

combine_callbacks(...)

Arguments

x	Object in loading
env	Data source environment as available as env in callback functions
concept	String valued concept name that will be loaded from the default dictionary
var_name	String valued variable name
aggregate	Forwarded to load_concepts()
val_var	String valued column name corresponding to the value variable
min_var, max_var	Column names denoting start and end times
grp_var	Optional grouping variable (for example linking infusions)
...	Functions which will be successively applied

Value

A copy of x with the requested concept merged in.

ricu documentation built on Sept. 8, 2023, 5:45 p.m.