A Julia package for generating visualizations in Vega
Getting Started
Visualization Primitives
Creating A Visualization From Scratch
Arguments:
v::VegaVisualization
title::AbstractString = ""
x::Int = 0
y::Int = -40
fill::AbstractString = "black"
fontSize::Int = 16
align::AbstractString = "center"
baseline::AbstractString = "top"
fontWeight::AbstractString = "bold"
font::AbstractString = ""This function mutates :VegaVisualization, adding/modifying a chart title.
using Vega, DataFrames, JSON
df = DataFrame()
for p in JSON.parse(readall(Pkg.dir("Vega", "vega-datasets/population.json")))
df = vcat(df, DataFrame(;[symbol(k)=>v for (k,v) in p]...))
end
pop1900 = df[df[:year] .== 1900, :];
x = pop1900[:people]
y = pop1900[:age]
group = pop1900[:sex]
a = popchart(x = x, y = y, group = group)title!(a, title = "Gender & Age Comparison - 1900")In Vega, there are only concepts of “marks”. What this implies is, you can continually add additional marks as desired, such as for a subtitle.
In Vega.jl, to add a subtitle (or multiple!), just change the y offset value. The larger the value (i.e. less negative until you cross over 0), the further DOWN the chart the title will be located. Note that there is nothing that keeps the titles from overlapping the chart; if you find the text to be in a sub-optimal location, just keep modifying the y parameter until you get the desired outcome.
x = [95, 86.5, 80.8, 80.4, 80.3, 78.4, 74.2, 73.5, 71, 69.2, 68.6, 65.5, 65.4, 63.4, 64]
y = [95, 102.9, 91.5, 102.5, 86.1, 70.1, 68.5, 83.1, 93.2, 57.6, 20, 126.4, 50.8, 51.8, 82.9]
cont = ["EU", "EU", "EU", "EU", "EU", "EU", "EU", "NO", "EU", "EU", "RU", "US", "EU", "EU", "NZ"]
z = [13.8, 14.7, 15.8, 12, 11.8, 16.6, 14.5, 10, 24.7, 10.4, 16, 35.3, 28.5, 15.4, 31.3]
v = bubblechart(x = x, y = y, group = cont, pointSize = z)
#Chart mods
v.width = 600
v.height = 300
xlim!(v, min = 60, max = 100)
ylim!(v, min = 10, max = 160)
#Main title
title!(v, title = "Sugar and Fat Intake Per Country")
#Subtitle - just change y offset, and fontSize/Weight if desired
title!(v, title = "Source: Euromonitor and OECD", y = -20, fontSize = 12, fontWeight = "")
ylab!(v, title = "Daily Sugar Intake", grid = true)
xlab!(v, title = "Daily Fat Intake", grid = true)
hline!(v, value = 50, strokeDash = 5, stroke = "gray")
vline!(v, value = 65, strokeDash = 5, stroke = "gray")