Quadratic & Cubic Regression RPN progs  Printable Version + HP Forums (https://archived.hpcalc.org/museumforum) + Forum: HP Museum Forums (https://archived.hpcalc.org/museumforum/forum1.html) + Forum: Old HP Forum Archives (https://archived.hpcalc.org/museumforum/forum2.html) + Thread: Quadratic & Cubic Regression RPN progs (/thread250271.html) 
Quadratic & Cubic Regression RPN progs  Matt Agajanian  09152013 Hello all. I'm looking for programs for Cubic and Quadratic Regression programs so that I can program HP67, HP34C, HP41/42S and the other programmable Voyagers, Spices, etc.
Thanks Edited: 15 Sept 2013, 12:01 a.m.
Re: Quadratic & Cubic Regression RPN progs  Pier Aiello  09152013 With a quick search i have gathered some discussions (from MoHPC) here: Best discussions of Hp calcs' community (wiki4hp)
Edited: 15 Sept 2013, 2:58 a.m.
Re: Quadratic & Cubic Regression RPN progs  Matt Agajanian  09152013 Hello there. Thanks for the link. What would help me out greatly is if you can tell me what the special symbols (the ones like \lf\>, \>, etc.) in steps 36, 37, 41 and 42 are of the HP42S program here:
Re: Quadratic & Cubic Regression RPN progs  Pier Aiello  09152013 Dunno, i don't have one. Maybe on the 42s manual is explained or i'll do another search when i have time.
Re: Quadratic & Cubic Regression RPN progs  Andrew Feist  09152013 I'm pretty sure \lf is "line feed" and \> is "arrow". Don't have a 42, so I don't know how to actually type those in.
Re: Quadratic & Cubic Regression RPN progs  Tom Grydeland  09162013
Quote: \lf is line feed. In the alpha menu (p.2) choose "PUNC", then button 6 from p2 of that menu (hencerforth Alpha/2 > punc/2 > LF) \> and \< are arrows. Alpha/2 > [arrows] > your choice \SIGMA is the capital greek letter. Alpha/2 > math > \SIGMA
Any other symbols unclear?
Re: Quadratic & Cubic Regression RPN progs  Matt Agajanian  09162013 Okay. Thanks. Moving on, because the ' \ ' symbol is unfamiliar, please clarify steps 52, 91, 94, 190, 225, 229, 243, 259.
Thanks again.
Re: Quadratic & Cubic Regression RPN progs  Jeff O.  09172013 Matt, 36 " [x,y]^{L}_{F}> Y, na" The "" is the append symbol, entered by pressing ENTER after entering alpha entry mode. I believe that the "*" symbol is intended to be the multiply symbol, which on the 42s is shown as an "x" (lowercase X) elevated one pixel. As Tom said above, the "^{L}_{F}" is the line feed character, which is on the second page of the PUNC menu in alpha mode. Hope this helps.
Jeff
Re: Quadratic & Cubic Regression RPN progs  Tom Grydeland  09172013 Jeff O. said:
Quote: That's the way I read it also. I would say "replace the \ and the character(s) that immediately follow with the (unprintable) character they are meant to represent." So, the string "\>" in the listing represent _one_ character in a HP42S string, namely {right arrow}. Similarly, I suppose "\.." represents the "ellipsis" character, Alpha/2 > Punc/2 > {...}
Does anyone have instructions on how to actually use this program?
Re: Quadratic & Cubic Regression RPN progs  Jeff O.  09172013
Quote: Yes, that is a better way to explain it. I did not think to look for the ellipsis in the PUNC menu. He probably meant that, but I wonder why he did not type three dots in the listing.
Regarding how to use, I have no personal knowledge. The PREGR.TXT file available at hpcalc.org tells how to use the HP48 version. Edited: 18 Sept 2013, 7:50 a.m.
