[TI-M] Re: Derivative on 83+
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[TI-M] Re: Derivative on 83+
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<-----Original Message----->
>
>From: robvanwijk@gmx.net
>Sent: 9/9/2002 7:59:12 AM
>To: ti-math@lists.ticalc.org
>Subject: [TI-M] Re: Derivative on 83+
>
>
> >
> >If you use "QuadReg(L1,L2,Y2)" the equation is automatically
> >stores to Y2. Saves you the recalling of RegEq.
> >
> >Rob van Wijk
> >
> =====
> Thanks, Rob. I can use that information. Actually, there may be a
slight
> regression error
> because the regression formula is an approximation. For a quad, it's
> pretty close.
>
> Also, since the calc can do quarticReg you can find derivative of a
> fifth order poly thusly.
>
>
> KrazyKyngeKorny
>
>If you use order+1 points (eg 3 for a quad, 4 for a cubic), the result
will
>be exact (except the last digit, sometimes).
>
>Rob van Wijk
>
Actually, that's quite true.
I did find that I can't use the autopost feature, since my TI is an 82.
I'll live
without this feature.
KrazyKyngeKorny