How can I calculate the slope of third order polynomial fit
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I have a third order polynomial fit. I would like to calculate the slope of the fit. Any ideas on how i can do this? Is possible to obtain this from the coefficients?
[p,S] = polyfit(x,y,3);
[y_fit,delta] = polyval(p,x,S);
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John D'Errico
le 12 Juil 2019
Is there a reason why you would not think to differentiate it?
help polyder
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