| T O P I C R E V I E W |
| jujumoi |
Posted - 10/07/2004 : 5:33:20 PM
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!
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| 2 L A T E S T R E P L I E S (Newest First) |
| jujumoi |
Posted - 10/08/2004 : 5:05:52 PM
Thanks for your reply. I just figured out the problem.
Best regards. |
| easwar |
Posted - 10/07/2004 : 8:58:04 PM
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 |
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