find_header: Find the header row in a data.frame

In janitor: Simple Tools for Examining and Cleaning Dirty Data

Find the header row in a data.frame

Description

Find the header row in a data.frame

Usage

find_header(dat, ...)

Arguments

dat	The input data.frame
...	See details

Details

If ... is missing, then the first row with no missing values is used.

When searching for a specified value or value within a column, the first row with a match will be returned, regardless of the completeness of the rest of that row. If ... has a single character argument, then the first column is searched for that value. If ... has a named numeric argument, then the column whose position number matches the value of that argument is searched for the name (see the last example below). If more than one row is found matching a value that is searched for, the number of the first matching row will be returned (with a warning).

Value

The row number for the header row

See Also

Other Set names: clean_names(), mu_to_u, row_to_names()

Examples

# the first row
find_header(data.frame(A="B"))
# the second row
find_header(data.frame(A=c(NA, "B")))
# the second row since the first has an empty value
find_header(data.frame(A=c(NA, "B"), B=c("C", "D")))
# The third row because the second column was searched for the text "E"
find_header(data.frame(A=c(NA, "B", "C", "D"), B=c("C", "D", "E", "F")), "E"=2)

janitor documentation built on Feb. 16, 2023, 10:16 p.m.