Finally did Cubic Splines. This is a super long video but I finally got it. If you need help let me know.
Root directory of repo
https://github.com/cmontalvo251/MATLAB
As of 4/2021 this link below works.
https://github.com/cmontalvo251/MATLAB/blob/master/Screen_Cast_Codes/Interpolation/cubicsplines.m
