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units
0.7-0.Update to version 8.1, the 2018 CODATA recommended values (#7 addressing #6). This version contains some breaking changes that are necessary to streamline future updates and provide a stable symbol table:
codata
table includes the absolute uncertainty
instead of the relative one. Thus, the rel_uncertainty
column has been dropped in favour of the new uncertainty
.
Also, columns have been slightly reordered.c
, the speed of light, has been renamed as c0
;
sigma
, the Stefan-Boltzmann constant, has been renamed as
sigma0
.codata$type
)
adopts the names defined by NIST in the webpage too. Some constants
belong to more than one category (separated by comma); some others
belong to no category (missing type).There are some new features too:
codata
data frame, this release
includes codata.cor
, a correlation matrix for all the
constants.syms_with_errors
and
syms_with_units
, there is a new list of symbols called
syms_with_quantities
(available if the optional
quantities
package is installed), which provides constant
values with uncertainty and units.syms_with_errors
and syms_with_quantities
is
provided (disabled by default; see details in help(syms)
for activation instructions).units::as_units()
instead of the deprecated
units::parse_unit()
(#1).1
instead of
unitless
as unit (#3).Ω
has been replaced by ohm
(#4).These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.
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