The package toOrdinal contains a single function
toOrdinal that converts a cardinal number (e.g., 9) into its ordinal counterpart (e.g., 9th). Because such conversions are language specific, the conversions are specific to a supported language. At present, the package implements Dutch, English, French, German, Spanish, and Swedish. For example,
After installing the package from either CRAN or GitHub, it’s simple to convert a cardinal to an ordinal number.
To convert cardinal to ordinal numbers in English (the default), supply the cardinal number to
> toOrdinal(5) 1] "5th"[
Conversion in other languages are performed by supplying the appropriate language to the
> toOrdinal(5, language="Dutch") 1] "5de" [> toOrdinal(5, language="German") 1] "5te" [> toOrdinal(5, language="French") 1] "5e" [> toOrdinal(5, language="Spanish") 1] "5.º" [> toOrdinal(5, language="Swedish") 1] "5:e"[
Current languages supported include: English, German, French, Spanish, and Swedish.
Since Version 1.1, the function
toOrdinalDate converts calendar dates to a long format, ordinal form.
> toOrdinalDate() list() > toOrdinalDate("2017-12-25") 1] "December 25th, 2017"[
If no argument is provided to
toOrdinalDate, then the current date derived from
Sys.date() is used to create the ordinal version of the calendar date. If a date is supplied, then it must be supplied as a character string of the form “YYYY-MM-DD” that is then converted to the more formal date format. Like with the function
toOrdinal the potential exists for multiple language support with
toOrdinalDate. However, the only language currently supported by
toOrdinalDate is English.
The first argument,
n, is the cardinal number to be converted to an ordinal number:
> sapply(1:10, toOrdinal) 1] "1st" "2nd" "3rd" "4th" "5th" "6th" "7th" "8th" "9th" "10th" [
If you have contribution (for example, another language) or a feature request for the toOrdinal package, don’t hesitate to write or set up an issue on GitHub. Current new features include the possiblity of converting cardinal numbers to ordinal words (e.g., 8 to eighth).