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

*To*: mathgroup at smc.vnet.net*Subject*: [mg28953] Re: [mg28948] Re: [mg28901] Re: Creating graph with only a few data points*From*: "Sherman Reed" <sherman.reed at worldnet.att.net>*Date*: Mon, 21 May 2001 00:43:40 -0400 (EDT)*References*: <9dtb52$f9a@smc.vnet.net> <200105180513.BAA06103@smc.vnet.net> <200105200228.WAA02184@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

Oliver, the important material was omitted (by my mistake) first I would think you would want to experimentally verify the (as well as possible)the location of the diode breakpoints: the endpoints of the low or no current region, and at least the beginning of the high conduction region and preferably the conduction at the end of the region of interest. assume they are {{0, 0}, {.97, .02}, {1, .996}, {1, 1.03}, {15, .98}} note the points are enclosed in braces, and the list by another set of braces then ListPlot[{{0, 0}, {.97, .02}, {1, .996}, {1, 1.03}, {15, .98}}, PlotRange -> All, PlotJoined -> True] should give you a good graph. Sherman C. Reed sherman.reed at att.net > ----- Original Message ----- > From: "Oliver Tonn" <nospam at newsranger.com> To: mathgroup at smc.vnet.net > To: mathgroup at smc.vnet.net > Subject: [mg28953] [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 > > > > > > > > > > > > > > >

**References**:**Re: Creating graph with only a few data points***From:*Oliver Tonn <nospam@newsranger.com>

**Re: Re: Creating graph with only a few data points***From:*"Sherman Reed" <sherman.reed@worldnet.att.net>

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

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