Convert a Date to an MMWR weekday

This is a reformat and re-export of a function in the MMWRweek package. It provides a snake case version of its counterpart, produces a factor of weekday names (Sunday-Saturday).

mmwr_weekday(x, abbr = FALSE)

Arguments

x	a vector of Date objects or a character vector in YYYY-mm-dd format.
abbr	(logical) if TRUE, return abbreviated weekday names, otherwise full weekday names (see Note).

Value

ordered factor

Note

Weekday names are explicitly mapped to "Sunday-Saturday" or "Sun-Sat" and do not change with your locale.

Examples

mwday <- mmwr_weekday(Sys.Date())