Re: Exceptions Style Problem

*To*: mathgroup at smc.vnet.net*Subject*: [mg86733] Re: Exceptions Style Problem*From*: "David Park" <djmpark at comcast.net>*Date*: Thu, 20 Mar 2008 02:50:23 -0500 (EST)*References*: <frqpkk$4ru$1@smc.vnet.net>

Gary, This is a little trip wire that WRI has inadvertently left in the path and almost everyone trips over it. Either it is a bug or it is a feature that needs clearer explanation in the documentation. Basically you have to use the equation form of Exclusions to make it work correctly. folium[t_] := {3 t/(1 + t^3), 3 t^2/(1 + t^3)}; ParametricPlot[folium[t], {t, -30, 30}, PlotRange -> {{-3, 3}, {-3, 3}}, PlotStyle -> Black, ExclusionsStyle -> Blue, Exclusions -> {t == -1}] -- David Park djmpark at comcast.net http://home.comcast.net/~djmpark/ "WetBlanket" <Wyvern864 at gmail.com> wrote in message news:frqpkk$4ru$1 at smc.vnet.net... >I generated a plot using this code: > > folium[t_]:={3t/(1+t^3),3t^2/(1+t^3)}; > > y1=ParametricPlot[folium[t],{t,-30,30},PlotRange->{{-3,3},{-3,3}}] > > It was a nice folium with the asymptote displayed. > > Next I plotted > > y1= ParametricPlot[folium[t], {t,-30,30},PlotRange->{{-3,3}, > {-3,3}},Exclusions->-1 ] > > As expected this gave me the folium without the asymptote displayed. > > Finally, I plotted > > y1= ParametricPlot[folium[t], {t,-30,30},PlotRange->{{-3,3},{-3,3}} > ,ExclusionsStyle->Blue,Exclusions->-1] > > I expected to see the asymptote displayed in Blue, since the > documentation for ExclusionsStyle says, "ExclusionsStyle is an option > to plotting functions that specifies how to render subregions excluded > according to Exclusions." > > But, instead I get the folium without the asymptote displayed. > > Can anyone help me understand what I am missing? > > Thanks > > Gary Boswell >