python - C++ curve fiting to find the coefficients of a cubic? -

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i have group of data points need fit curve , extract coefficients of polynomial , use them determine roots of polynomial. have python library, scipy optimize curve fit able extract coefficients, need have c++ version. noticed python library based on minpack downloaded minpack haven't been able figure out how use it. looked @ john burkhardt version found here, pretty compact version of minpack again haven't figured out how use it.

the python library leads me believe polynomial of form ax^2 + bx + c + d/x. thought maybe port scipy minpack c++ after looking @ realized bad idea, , python skills aren't enough. have related code examples using c++ version of minpack, links read, anything?

i minuit!

they offer standalone version, , it's packaged in root (a larger data analysis framework).

i've ever used through root's interface.


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