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Topic: Bivariate Pchip
Replies: 9   Last Post: Jan 19, 2013 6:14 AM

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samar

Posts: 7
Registered: 7/25/11
Re: Bivariate Pchip
Posted: Jan 16, 2013 11:09 PM
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"John D'Errico" <woodchips@rochester.rr.com> wrote in message <kd7l8o$hbg$1@newscl01ah.mathworks.com>...
> "samar" wrote in message <kd6sdp$qnk$1@newscl01ah.mathworks.com>...
> > Hi all,
> >
> > I would like to use Pchip function to interpolate my 2-dimensional data set.
> >
> > I'm actually using spline interpolation (with csapi function) but it doesn't work well.
> > I think that Pchip will be better for my data set but I have no idea how to use it with 2 variables: x1 (n values) and x2 (m values) are my variables and V=f(X1,X2) is the n*m matrix containning all values taken by f for each couple (x1,x2)
> >
> > The second question can we have the result of pchip in PPFORM?
> >
> > Thank you very much for you help!

>
> 1. pchip DOES return a ppform.
>
> 2. There is no 2-d pchip implemented for MATLAB that I know of.
>
> John


Thank you very much for your answer John
Do you have an idea whether there is another similar function in 2d?
As I said previously I'm using csapi function now and it doesn't perform well with my 2d data set!

Than you



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