Are Gadfly plots currently composable?

gadfly, ggplot2, julia

Solution

There is `add_plot_element()`, which can add stuff to an existing layer:

xs = [0:0.1:pi]
l = layer(x=xs, y=sin(xs))
add_plot_element(l, Guide.title("Now it has a title"))

You can then plot the layer using `plot(l)`, and invoke either `draw` or `display` to actually show something. Further down, there's a bunch of overloads that work on a `Plot` directly:

p = plot(x=xs, y=sin(xs))
add_plot_element(p, Guide.title("Now it has a title"))
display(p)

I can't find either of these functions in the documentation, but fortunately the source is comprehensible enough. One of the many joys of Julia =)

Problem

Is there currently a way to add plot elements together in Gadfly.jl? For example, in R if I have another function that returns a ggplot and I want to add a title to it, I'd do the following: ``` p <- makeMyPlot() p + ggtitle("Now it has a title") ``` Is there currently a Gadfly equivalent? If not, is this on Gadfly's roadmap?

Original source