On 30 October 2010 23:47, Jason Grout <jason-s...@creativetrax.com> wrote: > On 10/30/10 10:20 AM, Oscar Lazo wrote: >> > >> Making solution_dict the default seems apropiate for find_fit and >> solve. I still would prefer a symbolic result for find_fit though (at >> least an option to get that). Usually when one fits some data to a >> model what one is trying to do is to interpolate data in between the >> current data (plot the fitted function etc). Mathematica uses this two >> outputs in two different functions: >> >> For Fit they use a symbolic output: >> http://reference.wolfram.com/mathematica/ref/Fit.html >> >> For FindFit they use something that looks like a dictionary: >> http://reference.wolfram.com/mathematica/ref/FindFit.html > > > I think that having two functions sounds like a great approach. > > Jason
Wolfram Research do the same with integration. Integrate[] symbolic NIntegrate[] - numeric N[ Integrate[] ] - Numerical approximation to a symbolic answer. Integrate[] //N - another way of writing the above The same for finding roots. http://reference.wolfram.com/mathematica/ref/FindRoot.html (numerical) http://reference.wolfram.com/mathematica/ref/Root.html (symbolic) There are undoubtedly other examples too. Mathematica uses different functions for numerical and symbolic work. Dave -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
