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}]

plotting - Plot 4D data with color as 4th dimension

I have a list of 4D data (x position, y position, amplitude, wavelength). I want to plot x, y, and amplitude on a 3D plot and have the color of the points correspond to the wavelength. I have seen many examples using functions to define color but my wavelength cannot be expressed by an analytic function. Is there a simple way to do this? Answer Here a another possible way to visualize 4D data: data = Flatten[Table[{x, y, x^2 + y^2, Sin[x - y]}, {x, -Pi, Pi,Pi/10}, {y,-Pi,Pi, Pi/10}], 1]; You can use the function Point along with VertexColors . Now the points are places using the first three elements and the color is determined by the fourth. In this case I used Hue, but you can use whatever you prefer. Graphics3D[ Point[data[[All, 1 ;; 3]], VertexColors -> Hue /@ data[[All, 4]]], Axes -> True, BoxRatios -> {1, 1, 1/GoldenRatio}]

plotting - Adding a thick curve to a regionplot

Suppose we have the following simple RegionPlot: f[x_] := 1 - x^2 g[x_] := 1 - 0.5 x^2 RegionPlot[{y < f[x], f[x] < y < g[x], y > g[x]}, {x, 0, 2}, {y, 0, 2}] Now I'm trying to change the curve defined by $y=g[x]$ into a thick black curve, while leaving all other boundaries in the plot unchanged. I've tried adding the region $y=g[x]$ and playing with the plotstyle, which didn't work, and I've tried BoundaryStyle, which changed all the boundaries in the plot. Now I'm kinda out of ideas... Any help would be appreciated! Answer With f[x_] := 1 - x^2 g[x_] := 1 - 0.5 x^2 You can use Epilog to add the thick line: RegionPlot[{y < f[x], f[x] < y < g[x], y > g[x]}, {x, 0, 2}, {y, 0, 2}, PlotPoints -> 50, Epilog -> (Plot[g[x], {x, 0, 2}, PlotStyle -> {Black, Thick}][[1]]), PlotStyle -> {Directive[Yellow, Opacity[0.4]], Directive[Pink, Opacity[0.4]],

Blog

Search This Blog