Plots.jl/docs/qwt_examples.md

Lines

A simple line plot of the 3 columns.

plot(rand(100,3))

Functions

Plot multiple functions.

plot(0:0.01:4π,[sin,cos])

You can also call it with plot(f, xmin, xmax).

plot([sin,cos],0,4π)

Or make a parametric plot with plot(fx, fy, umin, umax).

plot(sin,(x->begin  # /home/tom/.julia/v0.4/Plots/docs/example_generation.jl, line 33:
            sin(2x)
        end),0,2π)

Global

Change the guides/background without a separate call.

plot(rand(10); title="TITLE",xlabel="XLABEL",ylabel="YLABEL",background_color=RGB(0.5,0.5,0.5))

Two-axis

Use the axis or axiss arguments.

Note: This is only supported with Qwt right now

plot(Vector[randn(100),randn(100) * 100]; axiss=[:left,:right],ylabel="LEFT",yrightlabel="RIGHT")

Vectors w/ pluralized args

Plot multiple series with different numbers of points. Mix arguments that apply to all series (singular... see marker) with arguments unique to each series (pluralized... see colors).

plot(Vector[rand(10),rand(20)]; marker=:ellipse,markersize=8,colors=[:red,:blue])

Build plot in pieces

Start with a base plot...

plot(rand(100) / 3; reg=true,fillto=0)

and add to it later.

scatter!(rand(100); markersize=6,color=:blue)

Heatmaps

heatmap(randn(10000),randn(10000); nbins=100)

Lots of line types

Options: (:line, :step, :stepinverted, :sticks, :scatter, :none, :heatmap, :hexbin, :hist, :bar)
Note: some may not work with all backends

plot(rand(20,4); linetypes=[:line,:step,:sticks,:scatter],labels=["line","step","sticks","dots"])

Lots of line styles

Options: (:solid, :dash, :dot, :dashdot, :dashdotdot)
Note: some may not work with all backends

plot(rand(20,5); linestyles=[:solid,:dash,:dot,:dashdot,:dashdotdot],labels=["solid","dash","dot","dashdot","dashdotdot"])

Lots of marker types

Options: (:none, :ellipse, :rect, :diamond, :utriangle, :dtriangle, :cross, :xcross, :star1, :star2, :hexagon)
Note: some may not work with all backends

plot(repmat(collect(1:10)',10,1); markers=[:ellipse,:rect,:diamond,:utriangle,:dtriangle,:cross,:xcross,:star1,:star2,:hexagon],labels=["ellipse","rect","diamond","utriangle","dtriangle","cross","xcross","star1","star2","hexagon"],linetype=:none,markersize=10)

Bar

x is the midpoint of the bar. (todo: allow passing of edges instead of midpoints)

bar(randn(1000))

Histogram

note: fillto isn't supported on all backends

histogram(randn(1000); nbins=50,fillto=20)

Subplots

subplot and subplot! are distinct commands which create many plots and add series to them in a circular fashion. You can define the layout with keyword params... either set the number of plots n (and optionally number of rows nr or number of columns nc), or you can set the layout directly with layout.

Note: Gadfly is not very friendly here, and although you can create a plot and save a PNG, I haven't been able to actually display it.

subplot(randn(100,5); layout=[1,1,3],linetypes=[:line,:hist,:scatter,:step,:bar],nbins=10,legend=false)

Adding to subplots

Note here the automatic grid layout, as well as the order in which new series are added to the plots.

subplot(randn(100,5); n=4)

subplot!(randn(100,3))