It depends what the pattern is, and whether it is 2D or 3D.
MATLAB has several fitting (parameter estimation and optimisation) functions, however the sort of optimisation you perform would be determined by your objective function, and of course the data. You will need to provide more detail, and ideally the data, or a representative sample of the data, and the sort of fitting you want to do.
Consider using the zip function to compress the data in a .zip file if it otherwise would exceed the the 5 MB size limit, or if the file type or extension is not one of those acceptable here. Use the ‘paperclip’ icon to upload it. It is always best to simply post the text of your MATLAB script here, rather than attaching it as a .m file.
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