match_arg_exact: match.arg with exact matching

In MARSS: Multivariate Autoregressive State-Space Modeling

match.arg with exact matching

Description

The base R match.arg() uses pmatch() and does partial matching. This is a problem for many functions where "xtt1" is different than "xtt", say. This function implements exact matching.

Usage

match.arg.exact(arg, choices, several.ok = FALSE, exact = TRUE) 

Arguments

arg	a character vector (of length one unless several.ok is TRUE).
choices	a character vector of candidate values
several.ok	logical specifying if arg should be allowed to have more than one element
exact	require exact matching

Examples

# this fails
# MARSS:::match.arg.exact(c("a"), c("aa", "bb"))
# this does not
match.arg(c("a"), c("aa", "bb"))

MARSS documentation built on Sept. 10, 2025, 10:27 a.m.