parse_dttm() extracts date and time components. parse_dttm() wraps around
parse_dttm_(), which is not vectorized over fmt.
parse_dttm_(
dttm,
fmt,
fmt_c = fmt_cmp(),
na = NULL,
sec_na = na,
min_na = na,
hour_na = na,
mday_na = na,
mon_na = na,
year_na = na
)parse_dttm(
dttm,
fmt,
fmt_c = fmt_cmp(),
na = NULL,
sec_na = na,
min_na = na,
hour_na = na,
mday_na = na,
mon_na = na,
year_na = na
)
A character matrix of six columns: "year", "mon", "mday",
"hour", "min" and "sec". Each row corresponds to an element in
dttm. Each element of the matrix is the parsed date/time component.
A character vector of dates, times or date-times.
In the case of parse_dttm(), a character vector of parsing
formats, or a single string format in the case of parse_dttm_(). When a
character vector of formats is passed, each format is attempted in turn
with the first parsing result to be successful taking precedence in the
final result. The formats in fmt can be any strings, however the
following characters (or successive repetitions thereof) are reserved in
the sense that they are treated in a special way:
"y": parsed as year;
"m": parsed as month;
"d": parsed as day;
"H": parsed as hour;
"M": parsed as minute;
"S": parsed as second.
A character vector of alternative values to allow during matching. This can be used to indicate different forms of missing values to be found during the parsing date-time strings.