Plot a figure and find the Equation

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Vicky vicky
Vicky vicky 2012-6-25
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

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grapevine
grapevine 2012-6-25
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

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