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Currently my BarLegend looks like:

BarLegend[{(ColorData["Rainbow"][Rescale[#, {0, .125}]] &) , {0, .11} }]

Barlgend

I would like to add white (maybe dotted) lines to Barlegend at positions {0.02, 0.04, ...} such that it looks like

Barlegend with lines

Since I'm not only creating one plot & BarLegend, I'd also like to manually place the ticks & labels of BarLegend to make sure the ticks & labels are at the same positions as the white lines. For example: I'd like to place the ticks, labels, and white lines at {0.03, 0.06, 0.09}.

How can I achieve the lines and the custom placement?

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3 Answers 3

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incRange = 0.020;
maxRange = 0.120;

BarLegend[{"Rainbow", {0, maxRange}}, 
          Ticks -> Table[i, {i, incRange, maxRange - incRange, incRange}],  
          TickLengths -> 25, RotateTicks -> 180,   
          TicksStyle -> Directive[Opacity[1], White, Dashed, FontColor -> Black], 
          LabelStyle -> {FontSize -> 12}, LegendMarkerSize -> {20, 300}]

enter image description here

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  • $\begingroup$ I get the BarLegend without the text. Can this be version dependent? I use Mathematica 9 and Ticks, TickLengths, RotateTicks, and TicksStyle are marked in red color. $\endgroup$
    – manifold
    Jun 17, 2016 at 6:53
  • $\begingroup$ The labels are hidden, because the barlegend isn't wide enough. Stretching the legend gives: s19.postimg.org/e50h22t5v/post3.jpg Is there any other solution? $\endgroup$
    – manifold
    Jun 17, 2016 at 7:06
  • $\begingroup$ And the labels are on the left in your solution. I'd need them on the right. $\endgroup$
    – manifold
    Jun 17, 2016 at 7:09
  • $\begingroup$ Maybe a possible solution is to not use BarLegend at all, but use another Contoutplot as the Legend. $\endgroup$
    – manifold
    Jun 17, 2016 at 7:13
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Thank you for your post, but I now plot the Legend with a Contourplot and get the full control over all options: 

plotoptions = {ColorFunction -> (ColorData["Rainbow"][
       Rescale[#, {0, .125}]] &), 
   MeshFunctions -> 
    Table[#3 &, {i, 1, Length[{0, .025, .05, .075, .1, .125}]}], 
   Mesh -> Table[{{tick, 
       Lighter[White, 
        HeavisideTheta[(tick/
            Max[{0, .025, .05, .075, .1, .125}]) - .5]]}}, {tick, {0, \
.025, .05, .075, .1, .125}[[2 ;; -2]]}], 
   MeshStyle -> {Dotted, DotDashed, Dashed, AbsoluteThickness[.5]}};

ContourPlot[y, {x, 0, 1}, {y, 0, .125}, Contours -> 100, 
 ContourLines -> False, PlotRange -> All, 
 ColorFunctionScaling -> 
  False,(*Frame\[Rule]{{False,True},{False,False}},*)
 FrameStyle -> Directive[RGBColor[.8, .8, .8], FontColor -> Black], 
 FrameTicks -> {{None, {0, .025, .05, .075, .1, .125}}, {None, None}},
  AspectRatio -> 10, ImageSize -> 50, Evaluate@plotoptions]

enter image description here

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One can use the undocumented option "StyledContours" to add individually styled lines to a BarLegend. 

BarLegend[{(ColorData["Rainbow"][Rescale[#, {0, .125}]] &), {0, .11}}, 
 "StyledContours" -> {{0.02, Directive[White, Dotted]}, {0.04, White}, {0.06, Red}, 
                      {0.08, White}, {0.1, Black}}]

Out

Ticks, labels, and white lines at a list of tick positions:

ticks = {0.03, 0.06, 0.09};
BarLegend[{(ColorData["Rainbow"][Rescale[#, {0, .125}]] &), {0, .11}}, 
 "StyledContours" -> Transpose[{ticks, ConstantArray[White, Length@ticks]}], 
 Ticks -> ticks]

Out2

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  • $\begingroup$ thank you for introducing another potentially useful undocumented option :) $\endgroup$
    – ubpdqn
    Aug 17, 2016 at 0:42

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