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HP 48G Linear Regression Best Fit Line
12-20-2021, 01:11 AM
Post: #37
RE: HP 48G Linear Regression Best Fit Line
(12-20-2021 12:15 AM)Rodger Rosenbaum Wrote:  ... Then the OFIT program becomes:

<< X ORTH * Y - >>

It may make more sense to return ORTH residuals, instead of vertical residuals.
Just multiply above by correction factor 1/√(1+m^2), where m = ORTH slope

1/√(1+m^2) = 1/√(1+tan(θ)^2) = cos(θ)

Bonus:

With ORTH residuals, ordering of X,Y does not matter.
Except for sign difference, we would get the same ORTH residuals.
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RE: HP 48G Linear Regression Best Fit Line - Albert Chan - 12-20-2021 01:11 AM



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