Clarification Needed for C1W2 Assignment - Input matrix?

[Shapl]

Hello,

I am currently working on the C1W2 assignment, and I need some clarification regarding the second exercise (back substitution). I believe I am using the wrong input matrix because it is already in reduced row echelon form, meaning it appears to be already solved.

Here is the matrix I’m currently using:

However, I feel that I should be using the row echelon form from the previous exercise, which looks like this:

If anyone could help me clarify this confusion, I would greatly appreciate it.

Thank you very much!

[gent.spah]

Perhaps here the matrix is a numpy array or some other type that you are not specifically setting before the function!

[TMosh]

Try casting your matrix as an np_array().