Interpolation: Method->"Spline"
- To: mathgroup at smc.vnet.net
- Subject: [mg98192] Interpolation: Method->"Spline"
- From: dh <dh at metrohm.com>
- Date: Thu, 2 Apr 2009 04:46:29 -0500 (EST)
Hello,
does anybody know what sort of splines Wolfram choose to implement. One
would assume that normal splines are the thing to do, but the second
derivative is not zero at the ends as the following shows:
d = Table[RandomReal[{-1, 1}], {5}]
f = Interpolation[d, Method -> "Spline"];
Plot[f[x], {x, 1, Length[d]},
Epilog -> Point[Transpose[{Range[Length[d]], d}]]]
Plot[f'[x], {x, 1, Length[d]}]
Plot[f''[x], {x, 1, Length[d]}]
Daniel