VarTimebyID: Extracting the start or end time

In derecost/LOGAN: Log File Analysis in International Large-Scale Assessments

Description

Extracting the start or end time

Usage

VarTimebyID(data, id.var, time.var, event.var, name.var.time, new.name)

Arguments

data	data frame
id.var	vector of unique identification
time.var	vector with the time variable
event.var	vector with the events
name.var.time	name of the time string to filter (ex.: "START_ITEM" or "END_ITEM")
new.name	name of the output variable

Value

a data frame with 'time' replaced with 'new.name'. The variable 'event.var' is dropped.

Examples

# Data preparation
df <- cp025q01
df$id <- paste(df[, 1], df[, 2], df[, 3], sep = "-")
df <- m0$TrimVar(df, c("event", "event_type", "diag_state"))
df <- m0$ConcatActions(df, c(rlang::quo(event), rlang::quo(event_type)))
df <- m0$CleanActions(df, event.type, c("ACER_EVENT_" = ""))

# Function demonstration
m1$VarTimebyID(df, id, time, new.event.type, "START_ITEM", "start")

derecost/LOGAN documentation built on June 19, 2020, 6:40 p.m.