21  Gadfly

using Gadfly, DataFrames

Basic plots using Gadfly.jl

21.1 Boxplot

x = randn(300);
y = randn(400) .+ 1.6;
z = randn(320) .- 2.2;

plot(x=repeat(["alpha"], 300), y = x, Geom.boxplot)

plot(
    x=vcat(
        repeat(["x"], length(x)), 
        repeat(["y"], length(y)),
        repeat(["z"], length(z))),
    y = vcat(x, y, z),
    Geom.boxplot
)

21.2 Density

plot(x=x, Geom.density)

dat = DataFrame(key = vcat(
    repeat(["x"], length(x)),
    repeat(["y"], length(y)),
    repeat(["z"], length(z))),
    val = vcat(x, y, z));

plot(dat, x = :val, color = :key, Geom.density)

21.3 Histogram

plot(x=x, Geom.histogram)

plot(dat, x = :val, color = :key, Geom.histogram)

21.4 Scatter

x = randn(300);
y = 3 .+ x.^3 + randn(300);
y2 = 4 .+ x.^2 + randn(300);

plot(x=x, y=y, Geom.point)

dat = DataFrame(
    x = repeat(x, 2),
    key = vcat(repeat(["y"], 300), repeat(["y2"], 300)),
    val = vcat(y, y2)
);

plot(dat, x=:x, y=:val, color=:key, Geom.point)

Add a smoother with Geom.smooth

plot(dat, x=:x, y=:val, color=:key, Geom.point, Geom.smooth)

21.5 Barplot

x = ["alpha", "beta", "gamma"];
y = [3, 9, 5];
y2 = [5, 8, 7];

plot(x=x, y=y, Geom.bar)

dat = DataFrame(
    x = repeat(x, 2),
    key = vcat(repeat(["y"], 3), repeat(["y2"], 3)),
    val = vcat(y, y2)
);

plot(dat, x=:x, y=:val, color=:key, Geom.bar)

21.6 Resources

• Gadfly Docs