astro_identity_matrix

<p>Returns a rotation matrix that has no effect on orientation.
This matrix can be the starting point for other operations,
such as using a series of calls to <code>astro_pivot()</code> to
create a custom rotation matrix.</p>

Provides access to the 'Astronomy Engine' C library
(<https://github.com/cosinekitty/astronomy>) by Don Cross. The library
calculates positions of the Sun, Moon, and planets, and predicts
astronomical events such as rise/set times, lunar phases, equinoxes,
solstices, eclipses, and transits. It is based on the 'VSOP87' planetary
model and is accurate to within approximately one arcminute. This package
bundles the single-file C source so that other R packages can link against
it via 'LinkingTo' without shipping their own copy.

Mitchell O'Hara-Wild

astronomyengine

astro_identity_matrix: Create an identity rotation matrix

Description

Usage

Arguments

Value

Examples