parse_unit: Parse unit from string
In columbia-glacier/units2: A Simple and Safe Interface to the units Package

Description Usage Arguments Details Examples

Converts a character string to units. If available, unit names are replaced by the corresponding symbol.

1	parse_unit(string)

string

(character) Unit string to parse.

The string may only contain unit names, numeric exponents, and operators "/", "*", "^", "(", and ")". Spaces between unit names are interpreted as "*". This includes the following standard formats:

Product power form (e.g. "kg m2 s-1")
Arithmetic expression (e.g. "kg * (m^2 / s)")
... or a mix of both (e.g. "kg1 (m^2 s-1)")

Unlike parse_unit:

Input must be a length-one character vector.
Unknown units throw an error (via ud.is.parseable).
Unit names are replaced by their symbol (via ud.get.symbol). This is a limitation of evaluating the constructed expression against ud_units.
An empty string results in units::as.units(1, value = units::unitless) rather than units::make_unit("").

For a list of supported units and their notation, see the UDUNITS-2 Units Database.

parse_unit("m/s")
parse_unit("(m)/(s)")
parse_unit("m s-1")
parse_unit("meters/seconds")
parse_unit("meters seconds-1")
parse_unit("kg * (m^2 / s^3)")
parse_unit("kg (m^2 / s^3)")
parse_unit("kg m2 s-3")
parse_unit("in")
parse_unit("in/s")
parse_unit("°")
parse_unit("µm/s")
parse_unit("mm")
parse_unit("H2O+1 m1 s-1")
## Not run: 
parse_unit("unknown")

## End(Not run)