Re: Why won't Horner[] work?
- To: mathgroup at smc.vnet.net
- Subject: [mg59028] Re: [mg58978] Why won't Horner[] work?
- From: Murray Eisenberg <murray at math.umass.edu>
- Date: Wed, 27 Jul 2005 01:24:50 -0400 (EDT)
- Organization: Mathematics & Statistics, Univ. of Mass./Amherst
- References: <200507260801.EAA00248@smc.vnet.net>
- Reply-to: murray at math.umass.edu
- Sender: owner-wri-mathgroup at wolfram.com
<< Algebra`Horner`
Horner[Fit[{{1, 200}, {200, 0}, {400, 200}}, {1, x, x^2}, x], x]
202.01 + (-2.01508 + 0.00502513 x) x
Note the required second argument, x, to Horner to indicate the variable!
Paul McHale wrote:
> When I issue the command:
>
> In:= Fit[ {{1,200},{200,0},{400,200}}, {1,x,x^2}, x]
>
> Out:= 202.01 - 2.01508 x + 0.00502513 x^2
>
> This seems good. But when I do
>
>
> In:= Horner[Fit[ {{1,200},{200,0},{400,200}}, {1,x,x^2}, x]]
>
> Out:= Horner[202.01 - 2.01508 x + 0.00502513 x^2]
>
>
> Why doesn't it evaluate the polynomial? To I need to convert the
> output of fit?
>
> Thanks,
> Paul
>
>
--
Murray Eisenberg murray at math.umass.edu
Mathematics & Statistics Dept.
Lederle Graduate Research Tower phone 413 549-1020 (H)
University of Massachusetts 413 545-2859 (W)
710 North Pleasant Street fax 413 545-1801
Amherst, MA 01003-9305
- References:
- Why won't Horner[] work?
- From: Paul McHale <paul.mchale@_NO_$PAMearthlink.net>
- Why won't Horner[] work?