Use of Surf with measured data

Question

Naftali Herscovici 2013-6-26

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回答： Image Analyst 2014-9-9

Hello,

I have measured data x,y,z that I can represent it in any format. I see a lot of example of using surf with formulas and such, but I could not find any examples of using surf with measured data. I would like to know how to organize the data in files, so I can use surf correctly.

Thanks

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Tom 2013-6-26

Is your Z a matrix or a vector?

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Answer 1

Yasushi Yamakawa 2014-9-9

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在 MATLAB Online 中打开

Easily Example in interactive command.

you import data.xls to variavle x,y,z.(data.xls is measured data file.) X=reshape(x,15,10) Y=reshape(y,15,10) Z=reshape(z,15,10) surf(X,Y,Z) view(0,90) datacursormode on

 you can see figure with measured data.
 if you make more coll, use meshgrid command,colorbar and callback function.

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Answer 2

Image Analyst 2014-9-9

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I know this is really old but since someone answered, I thought I would too. If the x, y, and z are not on a regular grid, you can use scatteredInterpolant() to create a regular grid from the more or less random locations of the (x,y) coordinates. It will give you z on a regular grid which you can then pass in to surf().