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bigspoon

Russia
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Posted - 02/29/2008 :  9:40:50 PM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
Origin Version (Select Help-->About Origin): 7.5, 8 (Demo)
Operating System: Win2000/XP

Dear Sir.

I want to approsimate 3D-plot. My 3D-plot build on Matrix Window (30x30points). Can I build approsimation? (I don't know formula of 3D-plot, only points).

--
BR, Mike

Leo_Li

China
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Posted - 03/03/2008 :  12:06:58 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Dear Mike,

What do you mean by saying "approsimate"? Is that some kind of nonlinear least square fitting since you also mentioned "formula"? If so, OriginPro8 provides a brand-new feature called "nonlinear surface fitting" that can fit the matrix data. Before fitting it, you may want to roughly check the profile of your 3D-plot, e.g. is it a peak? if it is, you can choose Gauss2D function as your formula. (Note that here 2D means that there are two independent variables, which is the case for matrix data).

Leo



Edited by - Leo_Li on 03/03/2008 12:08:05 AM
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