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Re: RationalApproximation

• To: mathgroup at smc.vnet.net
• Subject: [mg55031] Re: [mg55003] RationalApproximation
• From: DrBob <drbob at bigfoot.com>
• Date: Thu, 10 Mar 2005 05:24:33 -0500 (EST)
• References: <A4628A7C27BF0D48847FD4AB8536731D4E5015@blinky.mobile-mind.com>
• Reply-to: drbob at bigfoot.com
• Sender: owner-wri-mathgroup at wolfram.com

It's pretty clear those points aren't available, except (possibly) by solving for the zeroes of the error.

Bobby

On Wed, 9 Mar 2005 10:01:30 -0500, Scott Guthery <sguthery at mobile-mind.com> wrote:

> My bad.  RationalInterpolation[].  The docs say:
>
> "There are two ways of using RationalInterpolation. If you just specify
> a range in the independent variable, then the set of values is chosen
> automatically in a way that ensures a reasonable approximation for the
> degree of approximation you have chosen."
>
> The question is what is the set of values was chosen automatically.
>
> Cheers, Scott
>
> -----Original Message-----
> From: DrBob [mailto:drbob at bigfoot.com]
To: mathgroup at smc.vnet.net
> Sent: Wednesday, March 09, 2005 9:43 AM
> To: Scott Guthery; mathgroup at smc.vnet.net
> Subject: [mg55031] Re: [mg55003] RationalApproximation
>
> I find no such function in Help for version 5.1.1, and no match for it
> at WRI's documentation center. If searches like this always worked (but
> they don't), that would mean there is no such function. You may have to
> tell us what package the function comes from, before we can find any
> clues on it.
>
> The Calculus`Pade` package has EconomizedRationalApproximation and
> NumericalMath`Approximations` has a similar function called
> RationalInterpolation, but I see no sign that either of them "ends up
> using" any set of points at all.
>
> Bobby
>
> On Wed, 9 Mar 2005 06:34:28 -0500 (EST), Scott Guthery
> <sguthery at mobile-mind.com> wrote:
>
>> Is there any way to get RationalApproximation n automatic mode to give
> you back the set of points that it ended up using?
>> Thanks for any insight.
>> Cheers, Scott
>>
>>
>>
>>
>
>
>
> --
> DrBob at bigfoot.com
>
>
>
>
>
>



-- 
DrBob at bigfoot.com