The Origin Forum
File Exchange
Try Origin for Free
The Origin Forum
Home | Profile | Register | Active Topics | Members | Search | FAQ | Send File to Tech support
Username:
 Password:
Save Password
Forgot your Password? | Admin Options

 All Forums
 Origin Forum
 Origin Forum
 Differentiation		  New Topic  Reply to Topic
 Printer Friendly
Author Previous Topic Topic Next Topic Lock Topic Edit Topic Delete Topic New Topic Reply to Topic

ouss

Algeria
4 Posts
Posted - 11/18/2014 :  04:24:07 AM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
HELLO !

My main problem is how to differentiate an equation in ORIGIN 9.0 ??

The equation is too long it's an addition of a 3 exponential functions

f(X)=[a0*(1-exp(-2(x/W)^2 ))+a1*(1-exp(-2x^2 )(1+4(x/W)^4))+a2*(1-exp(-2(x/W)^2 )(1+8(x/W)^4-8(x/W)^6+4(x/W)^8))]

with just one variable x, w and the coefficients (a0,a1,a2) are unknown constants.

How Can I input all this parameters in ORIGIN 9.0 to get the derivate function ?
THANK YOU VERY MUCH FOR YOUR RESPONDS !
Edited by - ouss on 11/18/2014 05:10:42 AM

lkb0221

China
497 Posts
Posted - 11/18/2014 :  10:52:18 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi, Ouss

You want just calculate the result of the function or building a fitting function?

Zheng
Go to Top of Page

ouss

Algeria
4 Posts
Posted - 11/18/2014 :  11:33:44 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi zheng

I want to make a fit builder to the seconde derivate function

If you can provide me the instructions and steps to make a fit builder from this seconde derivate function please tell me !
Thank you very much.
Go to Top of Page

lkb0221

China
497 Posts
Posted - 11/18/2014 :  11:43:42 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Well, it might be a little complicated...
Please see the following tutorial about how to build fitting functions with differential equation:
http://www.originlab.com/doc/Tutorials/Fitting-Ordinary-Differential-Equation
Go to Top of Page
  Previous Topic Topic Next Topic Lock Topic Edit Topic Delete Topic New Topic Reply to Topic
 New Topic  Reply to Topic
 Printer Friendly
Jump To:
The Origin Forum © 2020 Originlab Corporation Go To Top Of Page
Snitz Forums 2000