Fitting Routines (Sinus)

[Sentinel]

Does anyone have data fitting routines?

I want to fit datapoints with a sinus or with a linear fit.


Thanks for help.

[keskiverto]

R? http://stat.ethz.ch/R-manual/R-devel/library/stats/html/lsfit.html

[Sentinel]

I would like to have the fitting routines in c++ or c code.

[keskiverto]

GSL? http://en.wikipedia.org/wiki/Curve_fitting#Software

Numerical Recipes? http://www.nr.com/