valid_udunits {units} | R Documentation |
The returned dataframe is constructed at runtime by reading the xml database
that powers unit conversion in [package:udunits2]. Inspect this dataframe to
determine what inputs are accepted by as_units
(and the other
functions it powers: as_units
, set_units
, units<-
).
valid_udunits(quiet = FALSE) valid_udunits_prefixes(quiet = FALSE)
quiet |
logical, defaults |
Any entry listed under symbol
, symbol_aliases
,
name_singular
, name_singular_aliases
, name_plural
, or
name_plural_aliases
is valid. Additionally, any entry under
symbol
or symbol_aliases
may can also contain a valid prefix,
as specified by valid_udunits_prefixes()
.
Note, this is primarily intended for interactive use, the exact format of the returned dataframe may change in the future.
a data frame with columns symbol
, symbol_aliases
,
name_singular
, name_singular_aliases
, name_plural
,
or name_plural_aliases
, def
, definition
,
comment
, dimensionless
and source_xml
if (requireNamespace("xml2", quietly = TRUE)) { valid_udunits() valid_udunits_prefixes() if(interactive()) View(valid_udunits()) }