Re: Problems with ListPlot

*To*: mathgroup at smc.vnet.net*Subject*: [mg88925] Re: Problems with ListPlot*From*: Bill Rowe <readnews at sbcglobal.net>*Date*: Wed, 21 May 2008 14:51:54 -0400 (EDT)

On 5/20/08 at 6:53 AM, szhorvat at gmail.com (Szabolcs Horv=C3=A1t) wrote: >igorvict at gmail.com wrote: >>I noticed the following problems when creating ListPlot in >>Mathematica 6 (see the example): >>ListPlot[{0, 1, 2}, PlotMarkers -> Style["\[FilledCircle]", >>FontSize -> 12], Joined -> True, GridLines -> Automatic, PlotRange >>-> {{1, 3}, {0.5, 1.5}}, PlotRangeClipping -> False, ImagePadding >>-> 10] >>1) The plot markers have an offset slightly to the left from their >>correct position >Precise positioning is not really achievable when glyphs from a font >are used as plot markers. The problem can be cured by using >graphics objects: >PlotMarkers -> {Graphics[Circle[]], .05} >Or if you need disks as plot markers, then just use a larger point >size. Why not use PlotMarkers -> {Graphics[Disk[]], .05} if you want disks as plot markers instead of circles? >>2) In addition of 1 point and 1 line (2 other should be clipped as >>they lie outside of the range) I see 2 points, where the line >>crosses the lower and upper edges of the plot. >I don't really understand this second question ... I think the original poster was thinking the graphic should be consistent with: ListPlot[{0, 1, 2}, PlotMarkers -> {Graphics[Disk[]], .05}, Joined -> True, GridLines -> Automatic, PlotRange -> {{1, 3}, {0.5, 1.5}}] Notice the top and bottom disks are clipped since the specified value of PlotRange isn't sufficient to fully include the top and bottom disks. I believe the reason this was not seen using the original poster's code was due to the inclusion of the ImagePadding option and using PlotRangeClipping->False which combine so that the top and bottom disks are not clipped. That is compare the graphic using the code above to: ListPlot[{0, 1, 2}, PlotMarkers -> {Graphics[Disk[]], .05}, Joined -> True, GridLines -> Automatic, PlotRange -> {{1, 3}, {0.5, 1.5}}, PlotRangeClipping -> False, ImagePadding -> 10]