parse_parttime function

Parse cdisc datetime strings as parttime matrix

Parse cdisc datetime strings as parttime matrix

Parse iso8601 datetime strings as parttime matrix

Parse iso8601 datetime strings as timespan array

Parse a character vector to create a matrix of datetime fields

parse_cdisc_datetime(x, warn = TRUE, ...)

parse_iso8601_datetime(x, warn = TRUE, ...)

parse_iso8601_datetime_as_timespan(x, ...)

parse_to_parttime_matrix(dates, regex = re_iso8601)

Arguments

• x: A character vector of iso8601 datetime strings
• warn: A logical indicating whether to warn when information would be loss when coercing to a parttime matrix.
• ...: Additional arguments unused
• dates: character vector of dates to parse for iso8601 components
• regex: A regular expression used for parsing parttime strings. Defaults to a parser for the ISO8601 standard. Should include named capture groups for each datetime field. See Details for more information.

Returns

A matrix of capture fields discovered while parsing CDISC-style datetimes.

A matrix of capture fields discovered while parsing ISO8601-style datetimes.

A character matrix of capture fields provided by the provided regular expression

Details

A format regular expression should separate the components of a valid datetime string, capturing strings which can be coerced to numeric values for each of the nine datetime fields:

• year
• month
• day
• hour
• min
• sec
• tzhour

Note

A timespan array is an internal data structure used as the backend representation of timespan objects. It consists of two parttime-like matrices (with the addition of an "inclusive" column), one for the lower- and upper-bounds of the timespan. Collectively, this amounts to a three dimensional array.

References

CDISC SDTMIG v3.4

"ISO_8601" on Wikipedia