Re: PlotVectorField Package (easy question?)

*To*: mathgroup at smc.vnet.net*Subject*: [mg15890] Re: [mg15838] PlotVectorField Package (easy question?)*From*: "Kevin J. McCann" <kevinmccann at Home.com>*Date*: Wed, 17 Feb 1999 23:33:38 -0500*Sender*: owner-wri-mathgroup at wolfram.com

You are attempting (I think) to do a gradient field on two functions 2x^2 + y and 3x-y. I believe that PlotGradient Field will only work on a single scalar function, e.g. PlotGradientField[2 x^2 + y, {x,-10,10 }, {y,-10,10}] Kevin -----Original Message----- From: Adam Price <ami at teleport.com> To: mathgroup at smc.vnet.net Subject: [mg15890] [mg15838] PlotVectorField Package (easy question?) >I am running Mathematica 3.0 on a G3, and having trouble using ><<Graphics`PlotVectorField` > >****************************** >In[55]:= > ><<Graphics`PlotField` > >In[56]:= > (PlotGradientField[{2 x^2 + y, 3 x - y}, {x,-10,10 }, {y,-10,10}] > >Out[56]= > > aphics`PlotField`PlotVectorField[ > {{4 x, 3}, {1, -1} , {x, -10, 10}, {y, -10, 10}, > {A long list of all the options}] > > >****************** >??PlotGradientField gives the help information from the package, but it >still won't plot. ??PlotVectorField returns: Global['PlotVectorField'] > >I have tried clearing everything, running from inside PlotField.m, and >even evaluating the example pages from the help manual. >PlotVectorField just won't run. What am I doing wrong? > >-Adam > >