Re: Epilog in ListLogPlot

*To*: mathgroup at smc.vnet.net*Subject*: [mg81454] Re: Epilog in ListLogPlot*From*: "David Park" <djmpark at comcast.net>*Date*: Sun, 23 Sep 2007 21:19:42 -0400 (EDT)*References*: <fd58sd$2i1$1@smc.vnet.net>

Bruce, I'm not certain if you actually meant {7,Log[7]} for the red point. If you did, then the point appears because it lies in the plot range of ListLogPlot. ListLogPlot[X, PlotStyle -> {AbsolutePointSize[5]}, Epilog -> {Red, Point@{7, Log[7]}}, AxesOrigin -> {0, 0}] But let's assume that you actually meant {7,7}. Then we run into problems. Even if we specify PlotRange -> All we do not obtain the point. ListLogPlot[X, PlotStyle -> {AbsolutePointSize[5]}, Epilog -> {Red, Point@{7, 7}}, PlotRange -> All] And here is another strange thing. If we try to shift the AxesOrigin, so the first point is off the axis, we lose the Axes altogether! Even if we add Axes->True. ListLogPlot[X, PlotStyle -> {AbsolutePointSize[5]}, Epilog -> {Red, Point@{7, 7}}, Axes -> True, AxesOrigin -> {0, 0}, PlotRange -> All] Such are the vargaries of working within the standard Mathematica graphics paradigm. If one uses DrawGraphics everything works as expected. Needs["DrawGraphics6`DrawingMaster`"] Draw2D[ {AbsolutePointSize[5], ListLogDraw[X], Red, Point[{7, 7}]}, AspectRatio -> 0.5, Axes -> True, AxesOrigin -> {0, 0}, Ticks -> {Automatic, CustomTicks[Log, {0, 4, {1, 2, 5}, {3, 4, 6, 7, 8, 9}}]}] -- David Park djmpark at comcast.net http://home.comcast.net/~djmpark/ "Bruce Colletti" <vze269bv at verizon.net> wrote in message news:fd58sd$2i1$1 at smc.vnet.net... > Re 6.0.1 under WinXP. > > Consider the code: > > X = {{2, 4}, {9, 5}, {12, 13}}; > ListPlot[X, Epilog -> {Red, Point@{4, 6}}] > ListLogPlot[X, Epilog -> {Red, Point@{7, 7}}] > > Helptext says ListLogPlot has ListPlot's options. > > Unlike Plot #1, why doesn't the red dot appear in Plot #2? > > Thankx. > > Bruce > > >