Re: ListVectorPlot - plotting at specific points

*To*: mathgroup at smc.vnet.net*Subject*: [mg112605] Re: ListVectorPlot - plotting at specific points*From*: "Sjoerd C. de Vries" <sjoerd.c.devries at gmail.com>*Date*: Thu, 23 Sep 2010 04:19:36 -0400 (EDT)*References*: <i79hsl$ofn$1@smc.vnet.net>

A certain minimum number of points seems to be necessary. You might also want to use the option VectorPoints->All to use only the points provided without interpolation. The following works: ListVectorPlot[{{{0, 0}, {1, 1}}, {{1, 0}, {1, 1}}, {{0, 1}, {1, 1}}}, VectorPoints -> All] Cheers -- Sjoerd On Sep 21, 8:04 am, gopher <gopherg... at gmail.com> wrote: > Contrary to the documentation, listing pairs of points and vectors i.e > > ListVectorFieldPlot[{{{0, 0}, {1, 1}}}] > gives an error: > > ListVectorPlot::vfldata: {{{0,0},{1,1}}} is not a valid vector field > dataset or a valid list of datasets. > > .After a lot of searching I found that the deprecated > << "VectorFieldPlots`" > ListVectorFieldPlot[{{{0, 0}, {1, 1}}}] > does work, but doesn't look as nice, especially the 3d version. > Various settings of the VectorPoints options also don't work. Is there > a solution? I am trying to make some simple examples of vector fields > on spheres to illustrate the Hairy Ball theorem. > > Abhishek