![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/175214/image.jpeg)
non linear curve fitting for scatter points
3 views (last 30 days)
Show older comments
hi...i have some scatter points in x-y coordinate.how can do curve fitting for them? please help me.its very necessary for me.
0 Comments
Answers (1)
Image Analyst
on 8 Jul 2014
When you say "non-linear" do you really mean nonlinear in x? Or do you mean just a regular polynomial, which can be, say a cubic, which can be solved with regular linear least squares like polyfit() gives you? You can have a fit that's not a straight line and it's still linear least squares because it's linear in the coefficients, not the x terms. I attach a demo for you that uses polyfit().
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/175214/image.jpeg)
3 Comments
Image Analyst
on 9 Jul 2014
I'm not familiar with finding mixtures of Gaussians. See Wikipedia article http://en.wikipedia.org/wiki/Mixture_density to get started.
See Also
Categories
Find more on Least Squares in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!