Re: VectorColorFunction

*To*: mathgroup at smc.vnet.net*Subject*: [mg124472] Re: VectorColorFunction*From*: Patrick Scheibe <pscheibe at trm.uni-leipzig.de>*Date*: Sat, 21 Jan 2012 05:12:27 -0500 (EST)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com*References*: <201201200655.BAA18272@smc.vnet.net>

Hi, maybe I misunderstood you, but the parameters which you can use in a VectorColorFunction are {x,y,fx,fy,norm}. Just use fx and fy to calculate your angle and make a color from it: VectorPlot[{x, y}, {x, -3, 3}, {y, -3, 3}, VectorColorFunction -> Function[{x, y, fx, fy, norm}, ColorData["BrightBands"][ Mod[ArcTan[fx, fy], 2*Pi]/(2*Pi)]], VectorColorFunctionScaling -> False] Cheers Patrick On Fri, 2012-01-20 at 01:55 -0500, Peter Rodenbach wrote: > Hi experts, > > I want to plot via ListVectorPlot a Field of Vectors. I obtained the > vectors from a physics experiment. The Norm of all vectors is very > similar, and what is important is its direction! > > Therefore, what I want to do now is: give each vector a color with a > different direction a different color, e.g., up to 0.5degree red, 0.5 > to 1 degree yellow, etc. > > The Problem: The norm of each vector is used as argument for the > function that determines the color, according to the help > > "With the setting VectorColorFunction->func, the arguments supplied to > func are as follows" ,...., x,y,Subscript[v, x],Subscript[v, > y],Norm[{Subscript[v, x],Subscript[v, y]}]" > > Does anyone have an idea for a workaround? > > Thanks > > Peter >

**References**:**VectorColorFunction***From:*Peter Rodenbach <peter.rodenbach@googlemail.com>