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How to use function from fitting without manually rewriting it?

Posted 10 years ago

Hi, I have some data, to which I am fitting a polynomial of degree 4.

In[112]:= funkcija = Fit[tocke, {1, x, x^2, x^3, x^4}, x]

Out[112]= 7655.48 - 1.37747*10^-16 x - 0.0000580449 x^2 + 
 1.0626*10^-23 x^3 - 8.35914*10^-13 x^4

Now what I need is actually derivative of this polynomial and I don't want to manually rewrite each coefficient, or is that really necessary?

In the end I am interested into values of the derivative in points from my first column of the imported data.

POSTED BY: Mitja Jan?i?
2 Replies

Well now I fell stupid. :D

Thanks for a nice and quick answer!

POSTED BY: Mitja Jan?i?
POSTED BY: Marco Thiel
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