legending - Changing the inter-item spacing in Legends (version 9 and up)

The legending functionality in versions 9 and higher is much easier to use than the PlotLegends package and other bespoke ways of creating legends in earlier versions. However, the vertical spacing between items is larger than I would like. How can I reduce this spacing?

Changing the LegendMarkerSize option to a smaller number without changing the size specified in the LegendMarkers option just ends up cutting off the graphic. LegendMargins doesn't affect the inter-item spacing, only the space between the whole legend and other items.

PointLegend[{RGBColor[1, 0, 0], RGBColor[0, 0, 1]}, {"Series 1", "Series 2"}, 
 LegendMarkers -> {{"\[FilledCircle]", 20}, {"\[FilledCircle]", 20}}, 
 LegendMarkerSize -> 19, 
 LabelStyle -> {FontFamily -> "Arial", FontSize -> 20}]

enter image description here

Answer

It turns out that the Spacings option does exactly what is needed, even though its use in legend constructs such as PointLegend is not documented, and it shows as red text when you use it in those constructs.

PointLegend[{Red, Blue}, {"Series 1", "Series 2"}, 

 LegendMarkers -> {{"\[FilledCircle]", 20}, {"\[FilledCircle]", 20}}, 
 Spacings -> {0.2, 0.2}, LegendMarkerSize -> 19, 
 LabelStyle -> {FontFamily -> "Arial", FontSize -> 20}]

enter image description here

This continues the tradition of undocumented options and functions in Mathematica.

UPDATE (2): the Spacings option is still marked with red text in version 10.0.1, 10.1 and 10.3 and 11.0.

Comments

plotting - Filling between two spheres in SphericalPlot3D

Manipulate[ SphericalPlot3D[{1, 2 - n}, {θ, 0, Pi}, {ϕ, 0, 1.5 Pi}, Mesh -> None, PlotPoints -> 15, PlotRange -> {-2.2, 2.2}], {n, 0, 1}] I cant' seem to be able to make a filling between two spheres. I've already tried the obvious Filling -> {1 -> {2}} but Mathematica doesn't seem to like that option. Is there any easy way around this or ... Answer There is no built-in filling in SphericalPlot3D . One option is to use ParametricPlot3D to draw the surfaces between the two shells: Manipulate[ Show[SphericalPlot3D[{1, 2 - n}, {θ, 0, Pi}, {ϕ, 0, 1.5 Pi}, PlotPoints -> 15, PlotRange -> {-2.2, 2.2}], ParametricPlot3D[{ r {Sin[t] Cos[1.5 Pi], Sin[t] Sin[1.5 Pi], Cos[t]}, r {Sin[t] Cos[0 Pi], Sin[t] Sin[0 Pi], Cos[t]}}, {r, 1, 2 - n}, {t, 0, Pi}, PlotStyle -> Yellow, Mesh -> {2, 15}]], {n, 0, 1}]

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plotting - Mathematica: 3D plot based on combined 2D graphs

I have several sigmoidal fits to 3 different datasets, with mean fit predictions plus the 95% confidence limits (not symmetrical around the mean) and the actual data. I would now like to show these different 2D plots projected in 3D as in but then using proper perspective. In the link here they give some solutions to combine the plots using isometric perspective, but I would like to use proper 3 point perspective. Any thoughts? Also any way to show the mean points per time point for each series plus or minus the standard error on the mean would be cool too, either using points+vertical bars, or using spheres plus tubes. Below are some test data and the fit function I am using. Note that I am working on a logit(proportion) scale and that the final vertical scale is Log10(percentage). (* some test data *) data = Table[Null, {i, 4}]; data[[1]] = {{1, -5.8}, {2, -5.4}, {3, -0.8}, {4, -0.2}, {5, 4.6}, {1, -6.4}, {2, -5.6}, {3, -0.7}, {4, 0.04}, {5, 1.0}, {1, -6.8}, {2, -4.7}, {3, -1.

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