There are a few issues regarding interpolation on grids that need to be validated and/or improved:
[ ] Validate that the behavior of the interpolators when called on values outside the grid is well-documented, correct, and behaves according to the "law of least surprise".
Note: Follow discussion in #69.
[ ] Add possibility for custom grids (besides linear and logarithmic)
Potential use cases: Kinks in the tax schedule, etc.
Implementation: Passing the custom grids to LCM's internals will be easy. The complexity of this feature stems from the fact that we need to write a get_custom_grid_coordinate function, that returns a generalized coordinate value for the interpolation.
There are a few issues regarding interpolation on grids that need to be validated and/or improved:
RegularGridInterpolatorcould be an improvement overmap_coordinatesfor the interpolation.get_custom_grid_coordinatefunction, that returns a generalized coordinate value for the interpolation.