       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 is a function call with the parameter 1, but:

ABB[] 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; 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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