Curve Fitting in Matlab

This brief video demonstrates how to fit data to a curve from within a Matlab figure Window. These videos were recorded for a course I teach as part of a distance masters degree. See http://mepp.engr.wisc.edu

Category:

Howto & Style

Tags:

• Matlab
• numerical

[ProfRHD]

I agree with all -- this is great! However, I think there is an error right at the end -- where you demonstrate how to enter an x value in the Basic Fitting window and click Evaluate, it provides an f(x) value.  Then you select plot results. You say that it plots in the linear fit model. However, in the middle section of the Basic Fitting window, the selected Fit was "5th degree polynomial" altho display-selected was linear. "Evaluate" is relative to the mid-window Fit selected; so is plot.

[jakeblanchard]

@ProfRHD

Nice catch. You are correct.

[meteoroman100]

Is there a possibility to put R² on graph?

[jakeblanchard]

@meteoroman100

I don't know of a simple way to do this. They will put the norm of the residuals on the plot. You can use this to calculate R^2 without too much difficulty.

[dabro4u]

This is awesome, I have spent like what? 2 months searching for a direct and easy way to do curve fitting method, and here it is, PERFECTLY EXPLAINED!!! Thanks Bro. Please any tips about contolling the way minor tick marks appear??? Thanks

[muraday]

it is my first sentence that you must be more useful for people. much more!

You are good!. Thanks.

We will have been waiting for your Matlab's video.

[AhmedTouma]

thanx

[slash20able]

thans for this video tutorial. It really helped me with my project. If you are interested i have some tutorials as well so go to my channel. Thanks

[retrogamingcables]

Morgan Freeman!

[jakeblanchard]

@maezawi

That's a good question. I don't know of a simple way to do this. All I can think of is to take the log of the x-data, then plot and do the fit, and then take the exponential to get back to the normal axes.

[anhthangyeu]

Thanks so much for posting

[jakeblanchard]

@JarOfBuckeyes

OK. Try this.

mathworks "dot" com "slash" products "slash" curvefitting

You might need to add the three w's at the beginning