| View previous topic :: View next topic |
| Author |
Message |
Ian
Joined: 30 Mar 2004
Posts: 15
Location: Nottingham, UK
|
 Posted: Tue Mar 30, 2004 2:30 pm Post subject: Least-squares |
 |
|
| does Dplot incorporate least-squares fitting of curves to find gradients etc? |
|
| Back to top |
|
 |
DPlotAdmin
Site Admin
Joined: 24 Jun 2003
Posts: 2310
Location: Vicksburg, Mississippi
|
| Posted: Tue Mar 30, 2004 2:46 pm Post subject: |
|
|
Yes. See Generate>Polynomial Curve Fit. Or with the licensed version also see Generate>More Curve Fits, which also includes a least-squares polynomial fit but has a few more options, including the ability to fit a range of your data and hold one or more coefficients in the resulting equation to fixed values.
_________________
Visualize Your Data
support@dplot.com |
|
| Back to top |
|
|
Ashi
Joined: 30 Dec 2007
Posts: 28
|
| Posted: Wed Aug 18, 2010 11:42 am Post subject: arbitrary curve fitting |
|
|
I am sure somebody has requested this already, but if you could get someone to help you with the code for generalized curve fitting (for an arbitrary function), I would no longer even bother buying a program like Origin or Sigmaplot, because then I could do virtually everything I need with Dplot and Excel put together  |
|
| Back to top |
|
|
DPlotAdmin
Site Admin
Joined: 24 Jun 2003
Posts: 2310
Location: Vicksburg, Mississippi
|
| Posted: Wed Aug 18, 2010 12:17 pm Post subject: |
|
|
I've started down that road several times, but all of my efforts to date end up with too many instabilities - you basically have to have a pretty good idea of the answer before you ask the question, else the solution procedure blows up with an overflow or other math error.
But thanks for the reminder.
_________________
Visualize Your Data
support@dplot.com |
|
| Back to top |
|
|
|
FAQ
Search
Memberlist
Usergroups
Profile
Log in to check your private messages
Log in
