suitable Regression or Curve fitting for vertical scattered Data

Hi everyone,
I have some vertical scattered Data. But I can not find a suitable cure fitting the Data. Does anybody have an idea? Is there any possiblity to get a good aproximated curve from such scattered data?
Best Regards

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Have you tried using the Scattered Data Interpolation functions? You can find more information here:
Additionally, the Curve Fitting Toolbox may have some helpful functionality:
If so and they have not worked, could you provide the data or a plot of it and why these methods have not worked for you?

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Nima
Nima 2015-8-14
编辑:Nima 2015-8-14
I guess you can try regression using artificial neural network (ANN):
Or you can go for some techniques in statistics and machine learning toolbox...

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