A "Interpolator" in spexxy is similar to a :doc:`Grid <grids>`, but works on a continuous parameter space instead of a discrete one. In fact, many interpolators build on an existing grid and allows for interpolation between grid points.
As with a :class:`Grid <spexxy.grid.Grid>`, the usual way of getting data from an interpolator is by calling it with the requested parameters:
ip = Interpolator() data = ip((3.14, 42.))
A class inheriting from :class:`Interpolator <spexxy.interpolator.Interpolator>` must overwrite all necessary methods, in particular :meth:`__call__() <spexxy.interpolator.Interpolator.__call__>` and :meth:`axes() <spexxy.interpolator.Interpolator.axes>`.
spexxy comes with three pre-defined interpolators:
- :class:`LinearInterpolator <spexxy.interpolator.LinearInterpolator>` performs linear interpolation on a given grid.
- :class:`SplineInterpolator <spexxy.interpolator.SplineInterpolator>` performs a cubic spline interpolation on a given grid.
- :class:`UlyssInterpolator <spexxy.interpolator.UlyssInterpolator>` extracts spectra from interpolator files created for the spectrum fitting package ULySS.
.. autoclass:: spexxy.interpolator.Interpolator
:members:
.. autoclass:: spexxy.interpolator.LinearInterpolator
:members:
.. autoclass:: spexxy.interpolator.SplineInterpolator
:members:
.. autoclass:: spexxy.interpolator.UlyssInterpolator
:members: