CODEWITHSUNDEEP
plotjuliagadfly
sigint
sigint

Reputation: 1882

Remove automatically generated color key in Gadfly plot?

I'm just starting out with Julia and trying to create a simple sin/cos plot using Gadfly. It all works well, however for some reason Gadfly insists on inserting its own Color... f1 f2 legends into the plot (see the red-outlined portion in the image). Could anyone please tell me what I should do to remove it? I've searched but couldn't find anything. The code that generates this is given below.

I'm using Julia 0.4.6 on Windows 10.

Plot Output

using Gadfly

set_default_plot_size(9inch, 9inch/golden)

πs = Char(960) # pi in string form
ticklabel_data = ["$πs/2", πs, "3$πs/2", "2$πs", "5$πs/2"]

global c = 0
incr = () -> global c = (c + 1) % 5 == 0? 1 : (c + 1) % 5
ticklabels = () -> ticklabel_data[incr()]

plot([sin, cos],
     0, 2 * pi,
     Guide.xticks(ticks=[pi/2, pi, 3 * pi / 2, 2 * pi]),
     Scale.x_continuous(labels = x -> @sprintf "%s" ticklabels()),
     Guide.manual_color_key("Color", ["sin", "cos"], ["#D4CA3A", "deepskyblue"])
)

Upvotes: 1

Views: 504

Answers (1)

Tasos Papastylianou
Tasos Papastylianou

Reputation: 22215

This seems to be because you're plotting "two things", as opposed to "one thing" with two layers.

Try:

plot(
    layer(sin, 0, 2 * pi, Theme(default_color=colorant"#D4CA3A")), 
    layer(cos, 0, 2 * pi, Theme(default_color=colorant"deepskyblue")),
    Guide.xticks(ticks=[pi/2, pi, 3 * pi / 2, 2 * pi]),
    Scale.x_continuous(labels = x -> @sprintf "%s" ticklabels()),
    Guide.manual_color_key("Color", ["sin", "cos"], ["#D4CA3A", "deepskyblue"])
)

Upvotes: 4

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