Refactor gradient position updates in lstsq and rPIE methods to improve stability.
Approach
Adds sets a minimum value for the update denominator to prevent division by zero.
Uses all probes instead of just the last probe for rPIE position update.
Use rPIE-like denominator for position update in lstsq method.
Pre-Merge Checklists
Submitter
[x] Write a helpfully descriptive pull request title.
[x] Organize changes into logically grouped commits with descriptive commit messages.
[x] Document all new functions.
[ ] Click 'details' on the readthedocs check to view the updated docs.
[x] Write tests for new functions or explain why they are not needed.
[ ] Address any complaints from pep8speaks.
Reviewer
[ ] Actually read all of the code.
[ ] Run the new code yourself; the included tests should make this easy.
[ ] Write a summary of the changes as you understand them.
Purpose
Refactor gradient position updates in lstsq and rPIE methods to improve stability.
Approach
Adds sets a minimum value for the update denominator to prevent division by zero. Uses all probes instead of just the last probe for rPIE position update. Use rPIE-like denominator for position update in lstsq method.
Pre-Merge Checklists
Submitter
Reviewer