.. include:: autodoc_abbr_options_c.rst

.. index::
   triple: setting; keywords; diatomic_anharmonicity()
   see: diatomic_anharmonicity()

.. _`sec:diatomic_anharmonicity()`:

Spectroscopic Constants for Diatomics
=====================================

.. codeauthor:: Andrew C. Simmonett

.. autofunction:: diatomic.diatomic_anharmonicity(rvals, energies)