add_variables {metatools}

Add Missing Variables

Description

This function adds in missing columns according to the type set in the metacore object. All values in the new columns will be missing, but typed correctly. If unable to recognize the type in the metacore object will return a logical type.

Usage

add_variables(dataset, metacore, dataset_name = NULL)

Arguments

dataset

Dataset to add columns to. If all variables are present no columns will be added.

metacore

metacore object that only contains the specifications for the dataset of interest.

dataset_name

Optional string to specify the dataset. This is only needed if the metacore object provided hasn't already been subsetted.

Value

The given dataset with any additional columns added

Examples

library(metacore)
library(haven)
library(dplyr)
load(metacore_example("pilot_ADaM.rda"))
spec <- metacore %>% select_dataset("ADSL")
data <- read_xpt(metatools_example("adsl.xpt")) %>%
   select(-TRTSDT, -TRT01P, -TRT01PN)
add_variables(data, spec)