The square with its breakdown, or null when pearsonSquare returns
null.
This is the only *Explained function in core that can return null. A
refusal has no number to explain, and making one up so the signature matched
the others would put a NaN in published docs.
The square with its breakdown, or
nullwhen pearsonSquare returnsnull.This is the only
*Explainedfunction in core that can returnnull. A refusal has no number to explain, and making one up so the signature matched the others would put aNaNin published docs.