Introduction to Matlab in English | 14b - Data fitting using "fit" function

[@vigneshbalaji21]

Nice explanation. What is the method that fit function usually uses to fit custom equations with data ?

[@kashmiriatIISc]

If we have to fit a data that consists of many "x" vectors and their corresponding "y" values, but having different vector sizes> Can you please provide some guidance

[@jobaidulislam7506]

Sir could you please help with "Establish UAV mathematical model in CBBA?" PLEASE?

[@mertyalcinoz591]

Hello Prof. Mohammed, one thing about video is that you forget to mention curve fitting toolbox before doing coding. It gave me an error while I am doing fittype>curve fit toolbax is needed. So I figure out how to deal with it but I think it is needed before coding.

[@MGMohammed]

Thanks for the note! You are right, I should have mentioned that in the video. To be honest, I did not know that the data fitting toolbox must be installed to run the "fit" function when I recorded this video :) I can post a video to demonstrate that.

[@onelivingsoul2962]

Hi can you help me with fit([x,y],z,'poly23'),in this 3d fit,i am getting error of dimension problem,even though everything checks out to be fine.

[@MGMohammed]

This function produces an error when the inputs (x, y and z) are not column vectors, i.e. dimensions in workspace must be n*1 as I have in the video 11*1 One fast solution is to write the same code using transposes: fit([x', y,],z','poly23') Hope this solves your problem!

[@onelivingsoul2962]

@@MGMohammed i have taken x[n,1] y[n,1] and z[n,n],still having this error. I have n^2 data points for each value of x & y,hence z is n×n

[@MGMohammed]

@@onelivingsoul2962 Try using this code before the fit function: [xout,yout,zout]=prepareSurfaceData(x,y,z) and use xout, yout and zout instead of x, y and z

[@onelivingsoul2962]

@@MGMohammed Thanks,it works now..! I will sub,keep posting amazing content like this