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RE: Values from InterpolatingFunction

• To: mathgroup@smc.vnet.net
• Subject: [mg11855] RE: [mg11847] Values from InterpolatingFunction
• From: "jmt" <jmthomas@cybercable.tm.fr>
• Date: Fri, 3 Apr 1998 03:45:19 -0500

Try this:
Here is a possible definition for an interpolating function:
d=Sort@Table[{Random[Real,{0,0.365}],Random[]},{10}]
f[x_]=(Interpolation@d)[x]
Here is the derivative:
g[x_]=D[f[x],x]
Here is a list of points (might be outside the definition domain)
sp=Table[Random[Real,{0,0.365}],{5}] Here are the values at these
points: Map[g,sp]

Hope this helps,


**************************************** Jean-Marie THOMAS
Conseil et Audit en Inginierie de Calcul Strasbourg, France
**************************************** -----Original Message-----
From: Volker Doerr [mailto:vd@cascade.de] To: mathgroup@smc.vnet.net
Subject: [mg11855] [mg11847] Values from InterpolatingFunction


Hello to all,

I have the following

   InterpolatingFunction[{{0.,365.}},<>][t]

produced by Function D from another InterpolatingFunction, and want
simply to get the approximate values at specific  points. I cannot find
a direct solution, probably because  the function has symbolic form.

Anybody out there who can help me?

Thanx a lot,

V o l k e r
vd@cascade.de