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Why won't Horner[] work?

• To: mathgroup at smc.vnet.net
• Subject: [mg58978] Why won't Horner[] work?
• From: Paul McHale <paul.mchale at _NO_$PAMearthlink.net>
• Date: Tue, 26 Jul 2005 04:01:43 -0400 (EDT)
• Sender: owner-wri-mathgroup at wolfram.com

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

• Follow-Ups:
  • Re: Why won't Horner[] work?
    • From: yehuda ben-shimol <bsyehuda@gmail.com>
  • Re: Why won't Horner[] work?
    • From: Murray Eisenberg <murray@math.umass.edu>