lookup

character string containing a regular expression to be matched
(see <code><a rd-options="" href="/link/grep?package=constants&version=1.0.1" data-mini-rdoc="constants::grep">grep</a></code>).

pattern

columns to perform pattern matching (see <code><a rd-options="" href="/link/codata?package=constants&version=1.0.1" data-mini-rdoc="constants::codata">codata</a></code>).

cols

additional arguments for <code><a rd-options="" href="/link/grep?package=constants&version=1.0.1" data-mini-rdoc="constants::grep">grep</a></code>.

A simple wrapper around <code><a rd-options="" href="/link/grep?package=constants&version=1.0.1" data-mini-rdoc="constants::grep">grep</a></code> for exploring the CODATA dataset.

CODATA internationally recommended values of the fundamental
physical constants, provided as symbols for direct use within the R language.
Optionally, the values with uncertainties and/or units are also provided if
the 'errors', 'units' and/or 'quantities' packages are installed.
The Committee on Data for Science and Technology (CODATA) is an
interdisciplinary committee of the International Council for Science which
periodically provides the internationally accepted set of values of the
fundamental physical constants. This package contains the "2018 CODATA"
version, published on May 2019:
Eite Tiesinga, Peter J. Mohr, David B. Newell, and Barry N. Taylor (2020)
<https://physics.nist.gov/cuu/Constants/>.

I<c3><b1>aki Ucar

constants

Reference on Constants, Units and Uncertainty

lookup function

character string containing a regular expression to be matched
(see <code><a rd-options='' href='grep'>grep</a></code>).

columns to perform pattern matching (see <code><a rd-options='' href='codata'>codata</a></code>).

additional arguments for <code><a rd-options='' href='grep'>grep</a></code>.

A simple wrapper around <code><a rd-options='' href='grep'>grep</a></code> for exploring the CODATA dataset.

lookup: Lookup for Fundamental Physical Constants

Description

Usage

Arguments

See Also

Examples