| T O P I C R E V I E W |
| Rizzy |
Posted - 11/29/2006 : 3:13:07 PM
Origin Version (Select Help-->About Origin): 6.0
Operating System: WinXP
Hello,
Can I fit gaussian surface into 3D (X,Y,Z) graph? The graph is a record of light intensities of a star, where X,Y are pixel coordinates of the source picture and Z is measured intensity. I know how to draw 3D graph of that, but I have to fit on it gaussian surface to find out maximal Z of the fitted gaussian surface.
Thanks. |
| 2 L A T E S T R E P L I E S (Newest First) |
| easwar |
Posted - 11/29/2006 : 9:18:38 PM
Hi Rizzy,
This technical article from our Knowledge Base may be of help:
http://www.originlab.com/index.aspx?s=9&pid=434
Easwar
OriginLab
Edited by - easwar on 11/29/2006 9:19:13 PM |
| larry_lan |
Posted - 11/29/2006 : 8:57:36 PM
Hi:
The 2D Gaussian function is:
So you can define a function in Nonlinear Curve Fit dialog:
z=z0+A*exp(-0.5*((x-xc)/w1)^2-0.5*((y-yc)/w2)^2);
where z is dependent and x & y is independent.
Larry
OriginLab Technical Services |
|
|
