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units

Measurement Units for R Vectors

Support for measurement units in R vectors, matrices and arrays: automatic propagation, conversion, derivation and simplification of units; raising errors in case of unit incompatibility. Compatible with the POSIXct, Date and difftime classes. Uses the UNIDATA udunits library and unit database for unit compatibility checking and conversion. Documentation about 'units' is provided in the paper by Pebesma, Mailund & Hiebert (2016, <doi:10.32614/RJ-2016-061>), included in this package as a vignette; see 'citation("units")' for details.

Functions (20)

Math.units

Mathematical operations for units objects

Ops.units

S3 Ops Group Generic Functions for units objects

as_difftime

convert units object into difftime object

boxplot.units

boxplot for unit objects

deparse_unit

deparse unit to string in product power form (e.g. km m-2 s-1)

drop_units

Drop Units

hist.units

histogram for unit objects

install_conversion_constant

Install a conversion constant or offset between user-defined units.

install_symbolic_unit

Define new symbolic units

install_unit

Define or remove units

keep_units

Apply a function keeping units

load_units_xml

Load a unit system

mixed_units

Create or convert to a mixed units list-column

plot.units

create axis label with appropriate labels

seq.units

seq method for units objects

ud_are_convertible

Test if two units are convertible

unitless

The "unit" type for vectors that are actually dimension-less.

units

Handle measurement units

units_options

set one or more units global options

valid_udunits

Get information about valid units

units

Measurement Units for R Vectors

v0.7-1

GPL-2

Authors

Edzer Pebesma [aut, cre] (<https://orcid.org/0000-0001-8049-7069>), Thomas Mailund [aut], Tomasz Kalinowski [aut], James Hiebert [ctb], Iñaki Ucar [aut] (<https://orcid.org/0000-0001-6403-5550>)

Initial release

units

Functions (20)

units

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