Re: Spline

• To: mathgroup at smc.vnet.net
• Subject: [mg58289] Re: [mg58281] Spline
• From: Bob Hanlon <hanlonr at cox.net>
• Date: Sun, 26 Jun 2005 01:33:51 -0400 (EDT)
• Sender: owner-wri-mathgroup at wolfram.com

```Needs["Graphics`"];

damprat={
0.014997649179748,0.054098060220146,0.104209568084688,
0.145267085272089,0.160493044616599,0.145267084912456,
0.104209571529220,0.054098058877509,0.014997649185286,
0};
dat=Range[0.1,1,0.1];
data1=Prepend[Table[{dat[[s]],damprat[[s]]*10/s},
{s,Length[dat]}],{0,0}];
spline=SplineFit[data1,Cubic];

ParametricPlot[spline[u],{u,0,10},
PlotRange->{0,0.4},Ticks->{dat,Automatic}];

Bob Hanlon

>
> From: Pratik Desai <pdesai1 at umbc.edu>
To: mathgroup at smc.vnet.net
> Date: 2005/06/25 Sat AM 01:56:49 EDT
> Subject: [mg58289] [mg58281] Spline
>
> Hi
> I am trying to fit a spline through a data set  ranging in value 0 to1
> incremented by  step size 0.1 (i.e the "x-axis" }, shown below. I have
> information for points 0.1 to 0.9 in damprat.  I know at point 0 and 1
> the values for damprat is zero. Now for presentation reasons I want the
> curve to pass through the points (0,0) and {1,0). Is there a way for the
> spline to be extended through those points. Any suggestions would be
> greatly appreciated
>
> << Graphics`Spline`
> damprat = {0.014997649179748, 0.054098060220146,
0.104209568084688, \
> 0.145267085272089, 0.160493044616599, 0.145267084912456,
> 0.104209571529220, \
> 0.054098058877509, 0.014997649185286}
> dat = Range[0.1, 0.9, 0.1]
> data1 = Table[{dat[[s]], damprat[[s]]*10/s}, {s, 1, Length[
>     dat]}] (*The dataset i am interested in fitting a spline through*)
> spline = SplineFit[data1, Cubic]
> ParametricPlot[spline[u], {
>   u, 0, 8}, Compiled ->
>     True, PlotRange -> {0, 0.4}, Ticks -> {dat, Automatic}]
>
> Thanks
>
> Pratik
>
> --
>
> Pratik Desai