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How to fit irregular data using Lowess/other correct method?

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Swanand Kulkarni
Swanand Kulkarni on 4 Dec 2016
Commented: Image Analyst on 4 Dec 2016
Hello, I really need some help- I have got two design variables with irrengular pattern.I wish to build a MATLAB code to establish a smooth relation and generate a relationship. I also want to plot and double-check that I have built it right. Can someone please tell how do I do it- is Lowess the best method to fit this curve? Thanks, Swanand.

Answers (1)

Image Analyst
Image Analyst on 4 Dec 2016
Lowess is a good method if you have the curve fitting toolbox. I don't, so I use the Savitzky-Golay filter, sgolayfilt() in the Signal Processing Toolbox. Or maybe a median filter will do the trick for you. It's claim to fame is it gets rid on impulsive noise while keeping true edges sharp.
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