Re: problems plotting a derivative
- To: mathgroup at smc.vnet.net
- Subject: [mg54617] Re: problems plotting a derivative
- From: "Jens-Peer Kuska" <kuska at informatik.uni-leipzig.de>
- Date: Thu, 24 Feb 2005 03:21:20 -0500 (EST)
- Organization: Uni Leipzig
- References: <cvc80j$qqu$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Hi,
ParametricPlot[Evaluate[{D[f[x], x], x^2}], {x, 0, 1}]
Regards
Jens
"J. K. Smith" <rob at pi-overe.com> schrieb im Newsbeitrag
news:cvc80j$qqu$1 at smc.vnet.net...
> 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}]
>
> When I run this I get error messages griping about numbers not being
> valid variables but it doesn't end up plotting anything. In this example
> I should see a straight line.
>
> I've tried using Evaluate[ D[f[x],x] ] and lots of other schemes which
> seemed to work in the past but I can't get ParametricPlot to digest any
> of them. Something about the result of that derivative doesn't yield
> something that can be plotted. But I don't know what property it is.
>
> Would you kind Mathematica gurus please get me thru this one (too)?
>
> Thanks.
>
> remove the dash if emailing
>