Re: DiscretePlot filling is darker above axis than below

*To*: mathgroup at smc.vnet.net*Subject*: [mg121326] Re: DiscretePlot filling is darker above axis than below*From*: "Oleksandr Rasputinov" <oleksandr_rasputinov at hmamail.com>*Date*: Sat, 10 Sep 2011 07:30:18 -0400 (EDT)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com*References*: <j4cnjh$hjr$1@smc.vnet.net>

On Fri, 09 Sep 2011 10:51:45 +0100, Christopher O. Young <cy56 at comcast.net> wrote: > Can't seem to get the filling to come out the same darkness above and > below > the axis. > > Show[ > DiscretePlot[ > Sin[t], {t, 0, 2 \[Pi], \[Pi]/6}, > ExtentSize -> \[Pi]/12, > PlotStyle -> {Red, Opacity[0.5]}, > Filling -> Axis, > FillingStyle -> {Red, Opacity[0.5]} > ], > Plot[Sin[t], {t, 0, 2 Pi} > ] > ] > According to the documentation of DiscretePlot, Filling -> Axis, FillingStyle -> {Red, Opacity[0.5]} means that bars above the axis will be red, and bars below will be 50% opaque. If you want them to be both red and 50% opaque regardless of position above or below the axis, you should use Directive[Red, Opacity[0.5]] although using this Directive for both PlotStyle and FillingStyle results in 75% opaque regions where the fill and markers are drawn on top of one another. Ordinarily one would solve this by specifying PlotStyle -> None, but for some reason DiscretePlot does not respond to this setting, and so we must draw completely transparent plot markers to get the same effect: Show[ DiscretePlot[ Sin[t], {t, 0, 2 \[Pi], \[Pi]/6}, ExtentSize -> \[Pi]/12, PlotStyle -> Opacity[0], Filling -> Axis, FillingStyle -> Directive[Red, Opacity[0.5]] ], Plot[Sin[t], {t, 0, 2 Pi} ] ]