Add mixed periodicity to MATLAB interpolators and implements interpolators in C++

[bewagner1]

What type of PR is this? (check all applicable)

• Refactor
• Feature
• Bug Fix
• Optimization
• Example
• Documentation

Description

This PR adds mixed periodicity capability to the MATLAB interpolators and implements the MATLAB interpolators in C++

Related Issues & Documents

• I have created an Issue that is paired with this PR
• Closes Mixed periodicity MATLAB interpolators and mimetic C++ interpolators #317

Added/updated tests?

• Yes
• No, and this is why: I don't know how best to check
• I need help with writing tests

Read Contributing Guide and Code of Conduct

• 📖 I have read the MOLE Contributing Guide: https://github.com/csrc-sdsu/mole/blob/main/CONTRIBUTING.md
• 📖 I have read the MOLE Code of Conduct: https://github.com/csrc-sdsu/mole/blob/main/CODE_OF_CONDUCT.md

[optional] Are there any post deployment tasks we need to perform?

Not that I can think of

[optional] What gif best describes this PR or how it makes you feel?

[jbrzensk]

@mdumett, there are a lot of changes in this, and we need your eyes on this, especially the MATLAB implementation.

[mdumett]

In test_interpol.m several csv files are read. Are those files included in this PR?

[bewagner1]

The files get created by test_interpol.cpp. It makes all of the non periodic and periodic operators (but not any mixed periodic operators) in cpp and then test_interpol.m reads them in and compares them to their matlab equivalents. Mostly just a sanity check that I left in. test_interpol.sh runs the cpp executable and then the matlab script and then removes all of the .csv files. My idea was to remove the scripts before merge b/c they aren't actually testing the operators, just comparing implementations.

[Tony-Drummond]

@bewagner1, since you are no longer submitting test_interpol.cpp, can you remove it from the list of source files in the CMakefile, thanks! At a later time, we will need to recreate your tests or add new tests for C++ interpolators. Thanks for this contribution!