Re: Fit

*To*: mathgroup at smc.vnet.net*Subject*: [mg7050] Re: [mg7011] Fit*From*: seanross at worldnet.att.net*Date*: Sat, 3 May 1997 22:04:43 -0400 (EDT)*Sender*: owner-wri-mathgroup at wolfram.com

WANNKE Michael wrote: > > Hi! > > I would like to fit a database. The function Fit works quite well, but > if I use the following command line: > fitted = Fit[database,{1,x,x^2},x] > Mathematica returns a fixed expression with x as variable. The problem > is that now x is the only variable which can be used: > Plot[fitted,{x,0,1000}] returns the right graph > Plot[fitted, {z,0,1000}] returns an error! > > How can I fit my database in order to get a function (style f[x]:=...)? > > Thank you very much. > > Michael Wannke > wannkem8 at cti.ecp.fr Use something like: f[a_]=Evaluate[Fit[database,{1,x,x^2},x]]/.x->a;