Backends are chosen running
chosenbackend()(that is, the name of the corresponding backend package, but written all in lower case) before calling the
plotfunction. You need to install at least one backend before being able to use the
Plotspackage. My preferred one is PlotlyJS (a julia interface to the plotly.js visualization library. ), but you may be interested also in PyPlot (that use the excellent python matplotlib VERSION 2).
Pkg.add("PyPlot.jl") # or Pkg.add("PlotlyJS")
pyplot() # or plotlyjs()
plot(sin, -2pi, pi, label="sine function")
Attention not to mix using different plotting packages (e.g.
Plotsand one of its backends). I had troubles with that. If you have already imported a plot package and you want to use an other package, always restart the julia kernel (this is not necessary, and it is one of the advantage, when switching between different bakends of the
You can find some useful documentation on
The following example uses StatsPlots in order to work directly on DataFrames (rather than on arrays). Passing the dataFrame as first argument of the
@dfmacro, you can access its columns by name and split the overall series using a third column.
using DataFrames, Plots, StatsPlots
df = DataFrame(
fruit = ["orange","orange","orange","orange","apple","apple","apple","apple"],
year = [2010,2011,2012,2013,2010,2011,2012,2013],
production = [120,150,170,160,100,130,165,158],
consumption = [70,90,100,95, 80,95,110,120]
mycolours = [:green :orange] # note that the serie is piled up alphabetically
@df df plot(:year, :production, group=:fruit, linestyle = :solid, linewidth=3, label = reshape(("Production of " .* sort(unique(:fruit))),(1,:)), color=mycolours)
@df df plot!(:year, :consumption, group=:fruit, linestyle = :dot, linewidth=3, label = reshape(("Consumption of " .* sort(unique(:fruit))),(1,:)), color=mycolours)
The first call to
plot()create a new plot. Calling
plot!()modify instead the plot that is passed as first argument (if none, the latest plot is modified)
fill = (0, 0.5, :blue).
To save the figure just call one of the following:
While an updated, expanded and revised version of this chapter is available in "Chapter 9 - Working with Data" of Antonello Lobianco (2019), "Julia Quick Syntax Reference", Apress, this tutorial remains in active development.