regression - logarithmic curve fit « Next Oldest | Next Newest »

 ▼ pieropiero Junior Member Posts: 1 Threads: 1 Joined: Jan 1970 10-02-2003, 09:37 AM From the HP-67 standard pack I have converted into qbasic language the linear, power, and exponention formulas as mentioned in pages 03-02 thru 03-04. They work alright but I am unable to make use of the logarithmic regression curve fit. This will not give the correct results. I do not need the qbasic program lines but I would like to get the correct logarithmic regression formula. Any help will be welcomed. I have some spare HP items, such as HP-41 complete with card reader and printer. Anyone interested? ▼ Tizedes Csaba Member Posts: 93 Threads: 15 Joined: Jan 1970 10-03-2003, 07:25 AM The form of the curve is: `y=a+b*ln(x)`, where `x>0`. Csaba

 Possibly Related Threads... Thread Author Replies Views Last Post Best statistical fit Richard Berler 8 1,275 10-30-2013, 11:25 PM Last Post: Walter B Challenge(?): Intersection curve between two cylinders in a specific position Pier Aiello 15 1,827 09-17-2013, 05:58 PM Last Post: Pier Aiello Quadratic & Cubic Regression RPN progs Matt Agajanian 9 1,259 09-17-2013, 11:37 AM Last Post: Jeff O. HP Prime : geometry & curve Mic 0 440 09-15-2013, 02:31 PM Last Post: Mic WP34s program submission: Quadratic fit Andrew Nikitin 2 596 06-13-2013, 02:44 AM Last Post: Paul Dale HP 32S-II Vertical Curve Program Ron Cardwell 2 661 05-20-2013, 07:54 AM Last Post: Thomas Klemm New empirical fit for ln(x) Namir 0 368 12-11-2012, 12:49 PM Last Post: Namir OT: Excel regression modeling using VBA Namir 0 397 12-06-2012, 10:05 AM Last Post: Namir Where is linear regression on an HP-41 Palmer O. Hanson, Jr. 22 2,423 08-13-2012, 10:43 PM Last Post: Gerson W. Barbosa WP 34S linear regression bug Nigel J Dowrick 9 1,261 05-12-2012, 06:23 PM Last Post: Paul Dale

Forum Jump: