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:
codatatable includes the absolute uncertainty instead of the relative one. Thus, the
rel_uncertaintycolumn has been dropped in favour of the new
uncertainty. Also, columns have been slightly reordered.
c, the speed of light, has been renamed as
sigma, the Stefan-Boltzmann constant, has been renamed as
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:
codatadata frame, this release includes
codata.cor, a correlation matrix for all the constants.
syms_with_units, there is a new list of symbols called
syms_with_quantities(available if the optional
quantitiespackage is installed), which provides constant values with uncertainty and units.
syms_with_quantitiesis provided (disabled by default; see details in
help(syms)for activation instructions).
units::as_units()instead of the deprecated
unitlessas unit (#3).
Ωhas been replaced by
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