Changes in version 0.1.0 (2021-05-18)                  

Initial release of the einsum R package.

Features:

  - einsum(): execute complex array multiplications using a concise and
    unambiguous based on the Einstein notation ("abc, b, c -> ac").
  - einsum_generator(): generate an efficient C++ function that can be
    used for repeatedly executing the same multiplication. It can also
    produce the source code for a C++ function which you can integrate
    into your own package.

Thanks to @kokitsuyuzaki for helping me push this over the finish line
and the numpy project for their equivalent function that inspired this
package.