Re: Evaluate a spline function
- To: mathgroup at smc.vnet.net
- Subject: [mg74090] Re: Evaluate a spline function
- From: dh <dh at metrohm.ch>
- Date: Fri, 9 Mar 2007 02:04:53 -0500 (EST)
- References: <esola2$ef5$1@smc.vnet.net>
Hi Ivan,
you seem to have misunderstood something. Interpolation returns a
function, e.g. f, if you feed it data of the form: {{x1,y1},{x2,y2},..}.
You get a value by: f[x] where x is not the order but a value of the
independent variable x.
Daniel
Ivan wrote:
> Hi,
> I have used the SplineFit to interpolate my data points for a curve
> y(x) and now
> would like to get the interpolated value between my data points.
> Is there a easy way to evaluate y(x) by directly inputting the value
> of x?
>
> i.e.
>
> y = SplineFit["data.dat",Cubic]
>
> how to get y(x) with x being the value of variable instead of the
> order of the data points.
>
> regards,
>
>