find_vars: Find matching column names

In BAAQMD/vartools: Extras for tidyverse-style selection and deselection

Description

Find the names of variable(s) matching a given pattern. If there are no matches, display an error message and stop.

Usage

find_all_vars(
  input_data,
  ...,
  suffix = NULL,
  .strict = FALSE,
  verbose = getOption("verbose")
)

find_var(input_data, pattern, suffix = NULL, verbose = getOption("verbose"))

find_id_var(input_data, ...)

find_qty_var(input_data, ...)

find_year_var(input_data, ...)

Arguments

input_data	(tabular data) must have one or more columns
...	variables to find (explicitly)
suffix	retained for backwards compatibility, but prefer 'pattern' instead
.strict	passed to 'tidyselect::eval_select()'
verbose	(logical) display messages
pattern	(character) regular expression (also see [glob2rx()])

Details

'find_var()' stops if more than one variable in 'input_data' matches 'pattern'.

Value

(character) name of variable(s) matching 'pattern'.

Functions

• find_all_vars: Find one or more

• find_var: Find exactly one

• find_id_var: Find variable ending in "_id"

• find_qty_var: Find variable ending in "qty"

• find_year_var: Find variable named "year" or ending in "yr"

BAAQMD/vartools documentation built on May 20, 2020, 1:35 a.m.