Re: Curve Fitting w/ Parametric Equations
- To: mathgroup at smc.vnet.net
- Subject: [mg16941] Re: [mg16905] Curve Fitting w/ Parametric Equations
- From: "Mark E. Harder" <harderm at ucs.orst.edu>
- Date: Thu, 8 Apr 1999 02:32:42 -0400
- Sender: owner-wri-mathgroup at wolfram.com
Fu-Lin -- I did the following, fitting parametric eqns. for x & y to data with noise in y. Each variable (x, & y) is fitted separately. Is this what you wanted? data= Table[{ 2t, 5 t^2+Random[Real,{- t,+t},3] },{t,0,5,.1} ]; ListPlot[data]; tVec=Table[t,{t,0.,5.,.1} ]; fitData=Table[{tVec[[i]],data[[i,j]]},{j,1,2},{i,1,51} ]; x=Fit[fitData[[1]],{t},t ] y=Fit[fitData[[2]],{t^2},t ] Show[ListPlot[data ], ParametricPlot[{x, y}, {t, 0., 5.}] ]; -mark e. harder -----Original Message----- From: Fu-Lin Tsung <flt at apk.net> To: mathgroup at smc.vnet.net Subject: [mg16941] [mg16905] Curve Fitting w/ Parametric Equations >Hi, > > I'd like to do curve fits using parametric equations. Is this possible? >Looking at an older manual (Mathematica-Wolfram, 2nd edition) I don't >think it is. I'm new to mathematica and am wondering if there are any >tricks/tips I can use to accomplish this task? > >Thanks for any and all tips and suggestions. > >flt >