BarLegend

BarLegend[cf] generates a legend that identifies colors from the color function cf with an automatic range of values.

BarLegend[{cf, {min, max}}] generates a legend that identifies colors from the color function cf with the range of values between min and max.

BarLegend[cf, n] limits the number of ticks shown on the legend to n.

Options

• LegendLabel adds a label to the legend.
• LegendLayout -> "Row" displays the color bar horizontally.
• LabelStyle styles the legend label and tick labels. Colors, FontFamily, and FontSize are supported.
• ImageSize sets the size of the color bar; use a two-element list to align the legend height with a plot.

Examples

Create a color bar legend:

BarLegend["Rainbow"]

With specified range:

BarLegend[{"TemperatureMap", {0, 100}}]

Add a label and limit the number of ticks:

BarLegend["Thermometer", 3,
 LegendLabel -> "Temperature",
 LabelStyle -> Directive[FontSize -> 14]
]

Create a horizontal bar and move its label by an absolute offset:

BarLegend[
 {"Rainbow", {0, 1}},
 2,
 LegendLayout -> "Row",
 ImageSize -> {300, 20},
 LegendLabel -> {"Temperature", {0, -35}}
]

Align a bar legend with a plot:

ContourPlot[
 (x^2 - y^2)/(x^2 + y^2)^2,
 {x, -1, 1}, {y, -1, 1},
 Contours -> 4,
 PlotLegends -> BarLegend[Automatic, ImageSize -> {20, 300}],
 ImageSize -> {300, 300},
 ColorFunction -> "Rainbow",
 ClippingStyle -> Automatic
]

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