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Re: Re: Creating graph with only a few data points

  • To: mathgroup at smc.vnet.net
  • Subject: [mg28948] Re: [mg28901] Re: Creating graph with only a few data points
  • From: "Sherman Reed" <sherman.reed at worldnet.att.net>
  • Date: Sat, 19 May 2001 22:28:07 -0400 (EDT)
  • References: <9dtb52$f9a@smc.vnet.net> <200105180513.BAA06103@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Oliver,

try this, I think it will be obvious what I did

Sherman C. Reed
sherman.reed at att.net
----- Original Message -----
From: "Oliver Tonn" <nospam at newsranger.com>
To: mathgroup at smc.vnet.net
Subject: [mg28948] [mg28901] Re: Creating graph with only a few data points


> First of all, thanks for trying to help me.
> I'm sorry, but your solution seems not to be applicable for my problem.
> I'm afraid, but I don't know which parameters I've to use for Table and
Plot.
> I know the plot command, but not in this context.
> The other problem is, that not only the y-values is up and down, also the
> x-value do so.
> For example:
>
> If you have the graph for a Thyristordiode, the x-axis would be the
voltage over
> the diode and the y-axis is the current. Until a specific voltage is
reached
> there is nearly no current floating. After that point a current is
floating and
> the voltage is going down.
>
> Everytime I try to enter data, e.g.
({0,0},{1,0.5},{2,0.5},{3,0.5],{1,15}), I
> get an error.
>
> Has anybody another idea?
>
> Greetings Oliver
>
>
> >Hello Oliver,
> >
> >draw your curve on squared paper and identify the coordinates {x, y} of
your
> >"significant points".
> >Then proceed as shown below:
> >
> >IN:
> >lst = {{1, 1}, {2, 1.5}, {2.5, 2}, {3, 3}, {4, 5}, {5, 6.5}};
> >itp = Interpolation[lst, InterpolationOrder -> 3];
> >Table[itp[x], {x, 1, 5, 0.5}]
> >Plot[itp[x], {x, 1, 5}]
> >
> >Best regards,
> >
> >Matthias Bode
> >Sal. Oppenheim jr. & Cie. KGaA
> >Koenigsberger Strasse 29
> >D-60487 Frankfurt am Main
> >GERMANY
> >Tel.: +49(0)69 71 34 53 80
> >Mobile: +49(0)172 6 74 95 77
> >Fax: +49(0)69 71 34 6380
> >E-mail: matthias.bode at oppenheim.de
> >Internet: http://www.oppenheim.de
> >
> >
> >
> >-----Ursprungliche Nachricht-----
> >Von: Oliver Tonn [mailto:nospam at newsranger.com]
> >Gesendet: Dienstag, 15. Mai 2001 06:59
> >An: mathgroup at smc.vnet.net
> >Betreff:  data points
> >
> >
> >Hello,
> >
> >I'm a student at a school for technicians (electronic). I'm making my
> >calculations with Mathematica.
> >For a documentation I want to create a graph with the characteristic of a
> >diode
> >and a transistor. I'm looking for a software, with which I only have to
> >enter
> >some significant points of the graph, the scale, and the legend. Then the
> >software should create the graph.
> >Does anybody know a software which could do that, or is it possible to do
> >this
> >with Mathematica.
> >
> >Greetings Oliver
> >
> >
>
>
>



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