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MathGroup Archive 2003

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Re: Derivative

  • To: mathgroup at smc.vnet.net
  • Subject: [mg43779] Re: Derivative
  • From: Paul Abbott <paul at physics.uwa.edu.au>
  • Date: Sat, 4 Oct 2003 02:04:57 -0400 (EDT)
  • Organization: The University of Western Australia
  • References: <blcqiv$p7d$1@smc.vnet.net> <blgiq3$g61$1@smc.vnet.net> <blj5lk$1f5$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

In article <blj5lk$1f5$1 at smc.vnet.net>,
 "extrabyte" <extrabyte22 at libero.it> wrote:

> Paul Abbott wrote:
> > and compute its derivative with respect to y.
> >
> >   dhdy[x_, y_] = Simplify[D[h[x,y],y]];
> 
> ehm, "Simplify" or "Evaluate"?

Evaluate is not required because Set (=) is used instead of SetDelayed 
(:=). Simplify is likely to be better because you then need to 
numerically integrate dhdy.

Cheers,
Paul

-- 
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