visit_subset: Subset fields from UK Biobank visit data

In philipdarke/ukbbhelpr: Helper functions for UK Biobank data

Description

Loads UK Biobank data and subsets required fields. Use to avoid loading full data each time. See https://biobank.ndph.ox.ac.uk/showcase/ to identify field codes.

Usage

visit_subset(data_path, fields, ..., save = NULL)

Arguments

data_path	Path to raw UK Biobank data unpacked using ukbunpack utility.
fields	Vector of fields to extract e.g. 50 or c(50, 21002).
...	Passed to fread e.g. to set file separator.
save	Optional path to save output.

Value

Data table with all instances/arrays for each field. Note the date field (53) is always returned.

philipdarke/ukbbhelpr documentation built on Dec. 22, 2021, 7:49 a.m.