guide_manual_color_key.md

---

title: manual_color_key author: Alex Ryckman Mellnik part: Guide order: 3006 ...

Manually define a color key

Arguments

• title: Legend title
• labels: Item labels
• colors: Item colors

Examples

Combine two layers into a plot, and set a custom color of one layer. Add a manual color key with labels that match the two layers. (Note that "deepskyblue" is the default color for Geom.line and others.)

using Gadfly
using DataFrames

Gadfly.set_default_plot_size(14cm, 8cm)

points = DataFrame(index=rand(0:10,30), val=rand(1:10,30))
line = DataFrame(val=rand(1:10,11), index = [0:10])
pointLayer = layer(points, x="index", y="val", Geom.point,Theme(default_color=colorant"green"))
lineLayer = layer(line, x="index", y="val", Geom.line)
plot(pointLayer, lineLayer, Guide.manual_color_key("Legend", ["Points", "Line"], ["green", "deepskyblue"]))