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[MUG] Interpolation in Maple
| [MUG] Interpolation in Maple |
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Author: Ryan Shannon
Posted: Thu, 25 Apr 2002 11:03:29 -0700
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>> From: Ryan Shannon "shannor"
Is there a Maple equivalent to Mathematica's Interpolation function? For
those not familiar, my understanding is that it fits polynomials between
successive data points *but never actually generates them until you need
them*.
In my case, I am trying to fit 2^14 data points. While Mathematica can
generate its InterpolatingFunctions in short order, I've been trying to
use a cubic spline on Maple and it takes *forever*. In fact, it's never
successfully finished.
Does anybody have suggestions for what I should be doing? The fit needs
to be pretty good because I'm regenerating an image from projection data
ala tomography. I tried a least squares, but it smears the data too much
and the result is unidentifiable.
Ryan Shannon
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| [MUG] Re: Interpolation in Maple |
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Author: Phil Mendelsohn
Posted: Tue, 30 Apr 2002 17:37:19 -0500
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>> From: Phil Mendelsohn "phil"
On Thu, Apr 25, 2002 at 11:03:29AM -0700, Ryan Shannon wrote:
> In my case, I am trying to fit 2^14 data points. While Mathematica can
> generate its InterpolatingFunctions in short order, I've been trying to
> use a cubic spline on Maple and it takes *forever*. In fact, it's never
> successfully finished.
>
> Does anybody have suggestions for what I should be doing? The fit needs
> to be pretty good because I'm regenerating an image from projection data
> ala tomography. I tried a least squares, but it smears the data too much
> and the result is unidentifiable.
Um, with a data set that large, is there a reason why you wouldn't
want to do an FFT?
--
www.rephil.org / University of Minnesota
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