Plot a figure and find the Equation

I want to plot NEDC driving cycle test and then I have to find the Equation of that plot. I have the NEDC data in excel format. The Plot is not fitted by curve fitting and the Excel plot. Can anyone help me

Answer 1

[grapevine]

You can use the polyfit and polyval functions

here you can find some examples

http://www.ece.utah.edu/~harrison/ece5720/MATLAB_curve_fitting.pdf

http://www.mathworks.nl/help/techdoc/ref/polyfit.html

http://nte.mines-albi.fr/MATLAB/co/uc_NonLineaire.html (if you speak French)

If you are looking for something more powerful, you should have a look at this toolbox

http://www.mathworks.nl/products/curvefitting/

http://www.mathworks.nl/products/curvefitting/

wish u the best