ymon_parse: Parse a character vector as year month

In DavisVaughan/datea: Extended Date Classes

Description

ymon_parse() is a parser for turning character input into ymon objects. The character method for as_ymon() is very strict, and only parses input of the form "YYYY-MM", erroring on any failures. ymon_parse() is more flexible and will only issue a warning if parsing fails.

Internally:

• "-%d" is appended to the format, and "-01" is appended to x.

• An attempt to parse as a Date is then made.

• The resulting Date is converted to ymon, with a warning if any input failed to parse. Failures result in NA.

Usage

ymon_parse(x, format = "%Y-%m")

Arguments

x	[character] A character vector to coerce to ymon.
format	[character(1)] A format to parse character input with. Should generally only consist of format tokens related to year or month. Common formats are "%Y-%m", "%b %Y", and "%Y %b".

Examples

ymon_parse("1970-01")
ymon_parse("1970 Jan", format = "%Y %b")

# Unparseable input results in `NA`, with a warning
try(ymon_parse(c("1970-00", "1970-01")))

DavisVaughan/datea documentation built on April 10, 2020, 12:03 a.m.