Re: TIB: re: maths
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Re: TIB: re: maths
That's pretty easy, just put Y3=nDir(Y1,x,0,x). This is the way it is done on the 82/3, I'm not
sure about the 85/6. What this does is calculate the dirivative from 0 to x of Y1. Look it up in
your manual. If the two equations look exactly the same, then you have correctly figured the
dirivative.
-Miles Raymond EML: m_rayman@bigfoot.com
ICQ: 13217756 IRC: Killer2 AIM: MRayMan
http://www.bigfoot.com/~m_rayman/
-----Original Message-----
From: Brice-Olivier Demory <brice.demory@span.ch>
To: ti-basic@lists.ticalc.org <ti-basic@lists.ticalc.org>
Date: Saturday, January 16, 1999 2:45 AM
Subject: Re: TIB: re: maths
>>Do you want to differentiate numerically or symbolically. Symbolic
>>differentiation would be a real pain in the neck. If you are only
>>looking for a numerical answer, I suggest that you try the built in nDer
>>(numerical differentiation)function, or, if the 85 has it, Der1
>>(semi-symbolic differentiation). You could, of course, write a numerical
>>differentiation program, but there's no need.
>
>Thank you Ben. My idea was to have an f(x) in y1.
>After that, I manually calulate is deritative and enter it in y2.
>I'd like to make a program which calculate some nDer from y1,
>and it compares with y2 values for the same "x" values used for
>the first step. If the compare test is good, my deritative is right.
>
>Brice-Olivier Demory - http://www.skylink-astro.net/pagepers/demory
>_________________________________________________________
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