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 > > > > > > >

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

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