x’ forecast only on HP-32E

[Joe Horn]

(06-21-2023 01:15 AM)Matt Agajanian Wrote:  

(06-20-2023 09:12 PM)brouhaha Wrote:  It's easy enough to write a subroutine to do it on the 11C and 15C. Swap two pairs of statistics registers (R3 with R5, R4 with R6), compute the y linear estimate, swap back. On the 15C this can be fairly conveniently done in the subroutine without disturbing the stack with a sequence of "x <>" instructions.

Just to clarify, I would be swapping Σx & Σy. Right?

Yes, but also swapping Σx² & Σy².