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
 Integrating a Surface		  New Topic  Reply to Topic
 Printer Friendly
Author Previous Topic Topic Next Topic Lock Topic Edit Topic Delete Topic New Topic Reply to Topic

jujumoi

Brazil
Posts
Posted - 10/07/2004 :  5:33:20 PM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
Origin Version (Select Help-->About Origin): 7.5
Operating System: Win XP
Hello all. When I convert my Z-Column from my worksheet to a Matrix (RandomXYZ - Renka-Cline), a Graph and a Matrix is created. However, the graph made by this convertion do not have the same values as the Matrix created.I was wondering if it is possible to integrate the surface on the graph created at the conversion rather than the surface on the matrix. (Or find out where is matrix with the values used on the graph). If this is too confused, please download this file:
http://jmologni.idohost.com/Integral.opj
or here:
http://members.lycos.co.uk/jujumoi/Integral.opj
Thanks in advance!

easwar

USA
1965 Posts
Posted - 10/07/2004 :  8:58:04 PM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi,

Not sure what you mean by: "the graph made by this convertion do not have the same values as the Matrix created".

The random conversion procedure using Renka-Cline (or any conversion method for that matter) creates a matrix by performing gridding on your scattered XYZ data. The default graph that is plotted has the matrix created by this routine plotted as a surface, along with your raw XYZ data plotted as scatter points.

The Renka-Cline gridding procedure could result in a surface/matrix that does not pass thru all of the raw data points because it is not a 2D spline fit. So the plot may not "look right". You could try other gridding methods to see if they work better.

Now, you can only integrate the surface defined by the matrix. It is not possible to integrate the "area" under the XYZ scatter data because there is no surface - just a bunch of scattered points.

To integrate the matrix surface, you can make the matrix window active, and use the Matrix->Integrate menu command.

Easwar
OriginLab



Edited by - easwar on 10/07/2004 9:00:24 PM
Go to Top of Page

jujumoi

Brazil
Posts
Posted - 10/08/2004 :  5:05:52 PM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Thanks for your reply. I just figured out the problem.
Best regards.
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