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MathGroup Archive 2001

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How can I make the output value of Interpolation[] preciser?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg26578] How can I make the output value of Interpolation[] preciser?
  • From: liwen liwen <gzgear at yahoo.com>
  • Date: Tue, 9 Jan 2001 01:51:52 -0500 (EST)
  • Sender: owner-wri-mathgroup at wolfram.com

Dear Friends:
             How are you!
             I want to increase the effective digits
for the output value of Interpolation[] so 
that it will be preciser .For example:
            
tab={{0,0},{0.25,0.255342},{0.5,0.546302},{0.75,0.931596},{1,1.55741},{1.25,3.00957},
{1.5,14.1014},{1.75,-5.52038}};
Cha=Interpolation[tab];
In[1]:x=Cha[0.674];
Out[1]:x=0.795744

I want to make the output value be preciser,for
example ,0.795744032781,so I modified the value of
{0.5,0.546302}
to be {0.5,0.5463024567854}and {0.75,0.931596} to be
{0.75,0.93159637289321},but the output value of
 Cha[0.674] does not turn to be preciser,it still
keeps 0.795744 ,what can I do?

Best Regards,

Liwen E-mail: gzgear at yahoo.com

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