visit_fields: Extract raw field data from UK Biobank visit data

In philipdarke/ukbbhelpr: Helper functions for UK Biobank data

Description

Extracts all instances/arrays of data for a UK Biobank field(s). See https://biobank.ndph.ox.ac.uk/showcase/ to identify field codes.

Usage

visit_fields(visit_data, fields, format = "wide")

Arguments

visit_data	Data frame/table with UK Biobank data.
fields	Vector of fields to extract e.g. 50 or c(50, 21002).
format	Format of output table i.e. "wide" or "long" (default "wide"). NOTE: watch for type coercion if use long format.

Value

Data table with all instances/arrays for each field.

Examples

## Not run: 
# Load data
data_path <- ""  # add path to your data
visit_data <- fread(data_path)

# Extract a field
visit_fields(visit_data, 50)

# Extract multiple fields
visit_fields(visit_data, c(50, 21002))

# Extract multiple fields in long format
visit_fields(visit_data, c(50, 21002), format = "long")

## End(Not run)

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