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Re: How to plot a variable

  • To: mathgroup at smc.vnet.net
  • Subject: [mg93129] Re: How to plot a variable
  • From: dh <dh at metrohm.ch>
  • Date: Mon, 27 Oct 2008 03:14:55 -0500 (EST)
  • References: <gdrqge$ms6$1@smc.vnet.net>


Hi Knut,

you must distinguish between functions and lists:

ABB[1] is a function call with the parameter 1, but:

ABB[[1]] is a list element. Further,

Plot will take a function that is defined for a continuous variable, 

otherwise use ListPlot.

hope this helps, Daniel



Knut Sørsdal wrote:

> When I iterate a variable in a do-loop it actually will not print out. Is it undefined? In Fortran this would never be a problem, but in mathematica it seems that it must be done different:

> 

> Do[  GA = GA + .5*(G[J] + G[J + 1])*DELT ; Amp = Exp[2.*GA] ; 

>   JJ = J + 1; ABB[1] = 1; ABB[JJ] = Amp, {J, 1, N1}] ;

> pl1 = Plot[ABB, {n, 1, NAX}, PlotLabel -> "Impedans", Filling -> Axis,

>    PlotRange -> All]

> 

> ABB gives no result..

> 





-- 



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.com>

Internet:<http://www.metrohm.com>




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