How to annotate on heatmaps in Makie.jl

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1

How to annotate heat maps in Makie.jl.

I was going through this post and the code in the question doesn’t seem to produce the text (numbers) on the heatmap.

The code is also provided below:

using DataFrames
using CSV
using CairoMakie

download("https://raw.githubusercontent.com/mwaskom/seaborn-data/master/flights.csv", "flights.csv")
flights = DataFrame(CSV.File("flights.csv"))

data = Array(unstack(flights, :year, :month, :passengers)[!, 2:end])

fig = Figure()
ax = Axis(fig[1, 1], xlabel = "Year", ylabel = "Month")
hm = heatmap!(ax, data)

Colorbar(fig[1, 2], hm)

text!(ax,
    string.(data'),
    position = [Point2f(x, y) for x in 1:12 for y in 1:12],
    align = (:center, :center),
    color = ifelse.(data' .< 400, :white, :black),
    textsize = 14,
    )

save("figure.png", fig)

fig

The error that I get:

image
image732×293 9.25 KB

Desired output:

image
image849×632 123 KB

Any help is appreciated. Thanks!

2

Do you need that example in particular?

You could take a look at the BeautifulMakie example which should be up to date

(saying because apart from version changes in makie, that other file could have changed since the original post).

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3

Amazing! The example on the link you provided works perfectly for my case as well. Thanks.

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