Load a unit system — load_units

Load an XML database containing a unit system compatible with UDUNITS2.

Usage

load_units_xml(path = default_units_xml())

Arguments

path: a path to a valid unit system in XML format.

Details

A unit system comprises a root <unit-system> and a number of children defining prefixes (<prefix>) or units (<unit>). See the contents of

system.file("share/udunits", package="units")

for examples.

Examples

# load a new unit system
load_units_xml(system.file("share/udunits/udunits2-base.xml", package="units"))
if (FALSE) {
set_units(1, rad) # doesn'twork
}

# reload the default unit system
load_units_xml()
set_units(1, rad) # works again
#> 1 [rad]