MathGroup Archive 2001

[Date Index] [Thread Index] [Author Index]

Search the Archive

Re: Creating graph with only a few data points

  • To: mathgroup at
  • Subject: [mg28964] Re: Creating graph with only a few data points
  • From: Oliver Tonn<oliver.tonn at>
  • Date: Wed, 23 May 2001 01:54:30 -0400 (EDT)
  • References: <mmLN6.9489$>
  • Sender: owner-wri-mathgroup at


>You probably could get some good help with your problem but you are not
>giving people a chance to help you. First, without giving a valid email
>address people can't communicate with you and if they can't communicate with
>you, they can't help you.

sorry about that stupid email adress. In my office I've to use a html-frontend
( for reading news, cause our firewall don't let the
news-protocol through. Might be better now, cause I've changed some settings.
If not my email-adress is oliver.tonn at

>What, exactly, is it that you want to plot? Then, how can you plot
>it to make a nice piece of graphics? Are your data points supposed to fit
>some kind of model? Then what is the model? You may need to use something
>like the Statistics`NonlinearFit` package.

I want to plot the characteristic line of some electronic devices (e.g. diodes,
thyristors, varistors). The problen is, that for many devices there is no
function that could discribe there characteristic. So the only way to plot one
is to get some points out of the data sheet and interpolate the rest.
My big problem till now was, that mathematica seems to have problems with the
interpolation, if the value of the x-axis isn't going only in one direction
(e.g. x,y  {1,0.5},{2,0.5},{3,0.5},{3,0.7},{2.5,3},{2,9}).
I tried do use Excel instead, but the resolution of the curve is too bad.

Greetings Oliver

  • Prev by Date: ColorFunction for ListPlot3D, ListContourPlot or ListDensityPlot ?
  • Next by Date: CalculationCenter woes
  • Previous by thread: RE: Re: Creating graph with only a few data points
  • Next by thread: MatrixPower[]