Below is an example of how to use the :class:`symfit.core.models.CallableNumericalModel`. This class allows you to provide custom callables as your model, while still allowing clean interfacing with the :mod:`symfit` API.
These models also accept a mixture of symbolic and callable components, as will be demonstrated below. This allows the power-user great flexibility, since it is still easy to interface with :mod:`symfit`'s constraints, minimizers, etc.
.. literalinclude:: ../../examples/callable_numerical_model.py
:language: python
This is the resulting fit:
