You dust off your Linear Algebra Textbook

You try and remember what the rank of a matrix means, and it makes no sense. Next thing you know you’re trying to code up a Householder QR-Factorization from scratch. You re-run the code with several different methods for inverting a matrix and get the exact same result.

What do you do?

1. This is ridiculous, it must be in ReIterateThroughDataBaseGreaterThanZero(X,YIn,Params)
2. Re-write all of the linear algebra library, let’s start from a clean basis
3. Maybe there’s something wrong with the input, go up another function