Re: problems plotting a derivative
- To: mathgroup at smc.vnet.net
- Subject: [mg54604] Re: problems plotting a derivative
- From: dh <dh at metrohm.ch>
- Date: Thu, 24 Feb 2005 03:21:08 -0500 (EST)
- References: <cvc80j$qqu$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Hello J.K.,
see below
J. K. Smith wrote:
> I've tried a lot of ways but nothing has worked so far.
> The following statements are my problem simplified:
>
> f[x_] := 2x^3;
> ParametricPlot[{D[f[x], x], x^2}, {x, 0, 1}]
ParametricPlot has the Attribute "HoldAll". Therefore, either you do the
derivative
outside the ParametricPlot or you need Evaluate inside ParametricPlot like:
ParametricPlot[Evaluate[{D[f[x], x], x^2}], {x, 0, 1}]
This works at least on Mathematica 5.1
Sincerely, Daniel
--
Daniel Huber
Metrohm Ltd.
Oberdorfstr. 68
CH-9100 Herisau
Tel. +41 71 353 8585, Fax +41 71 353 8907
E-Mail:<mailto:dh at metrohm.ch>
Internet:<http://www.metrohm.ch>