如何注释 Gadfly 热图？

Question

来自 Python 我正在尝试使用 Gadfly 包在 Julia 中重现 this Seaborn 情节。我有两个问题：

如何在不“复制”代码行的情况下用每个单元格的实际值注释此热图？
以及如何修改 xticks 以显示从 1949 年到 1960 年的所有年份值？

到目前为止我的代码：

using DataFrames
using CSV
using Gadfly
using Compose
using ColorSchemes 

download("https://raw.githubusercontent.com/mwaskom/seaborn-data/master/flights.csv", "flights.csv");
flights = DataFrame(CSV.File("flights.csv"))
flights_unstacked = unstack(flights, :month, :year, :passengers)

set_default_plot_size(16cm, 12cm)

plot(
    flights, 
    x=:year, 
    y=:month, 
    color=:passengers, 
    Geom.rectbin, 
    Scale.ContinuousColorScale(palette -> get(ColorSchemes.magma, palette)),
    Guide.xticks(ticks=[minimum(flights.year):maximum(flights.year);]), 
    Theme(background_color = "white"),

    Guide.annotation(compose(context(), text(fill(1949, 12), 1:12, string.(flights_unstacked[:, "1949"]), [hcenter], [vcenter]), fontsize(7pt), stroke("white"))), 
    Guide.annotation(compose(context(), text(fill(1950, 12), 1:12, string.(flights_unstacked[:, "1950"]), [hcenter], [vcenter]), fontsize(7pt), stroke("white"))), 
    Guide.annotation(compose(context(), text(fill(1951, 12), 1:12, string.(flights_unstacked[:, "1951"]), [hcenter], [vcenter]), fontsize(7pt), stroke("white"))), 
    Guide.annotation(compose(context(), text(fill(1952, 12), 1:12, string.(flights_unstacked[:, "1952"]), [hcenter], [vcenter]), fontsize(7pt), stroke("white"))), 
    Guide.annotation(compose(context(), text(fill(1953, 12), 1:12, string.(flights_unstacked[:, "1953"]), [hcenter], [vcenter]), fontsize(7pt), stroke("white"))), 
    Guide.annotation(compose(context(), text(fill(1954, 12), 1:12, string.(flights_unstacked[:, "1954"]), [hcenter], [vcenter]), fontsize(7pt), stroke("white"))), 
    Guide.annotation(compose(context(), text(fill(1955, 12), 1:12, string.(flights_unstacked[:, "1955"]), [hcenter], [vcenter]), fontsize(7pt), stroke("white"))), 
    Guide.annotation(compose(context(), text(fill(1956, 12), 1:12, string.(flights_unstacked[:, "1956"]), [hcenter], [vcenter]), fontsize(7pt), stroke("white"))), 
    Guide.annotation(compose(context(), text(fill(1957, 12), 1:12, string.(flights_unstacked[:, "1957"]), [hcenter], [vcenter]), fontsize(7pt), stroke("white"))), 
    Guide.annotation(compose(context(), text(fill(1958, 12), 1:12, string.(flights_unstacked[:, "1958"]), [hcenter], [vcenter]), fontsize(7pt), stroke("white"))), 
    Guide.annotation(compose(context(), text(fill(1959, 12), 1:12, string.(flights_unstacked[:, "1959"]), [hcenter], [vcenter]), fontsize(7pt), stroke("white"))), 
    Guide.annotation(compose(context(), text(fill(1960, 12), 1:12, string.(flights_unstacked[:, "1960"]), [hcenter], [vcenter]), fontsize(7pt), stroke("white"))), 
    )

Answer 1

年份xticks答案是加

Guide.xticks(ticks=[minimum(flights.year):maximum(flights.year);]),

到情节陈述。

然后您需要一个 Guide.annotation() 语句作为注解。它需要一些调整才能看起来与 Seaborn 的一样，但这可以满足您的需要：

Guide.annotation(
    compose(
        context(),
        text(
            flights.year,
            12:-1:1,
            string.(flights.passengers),
            [hcenter for x in flights.passengers],
        ),
        fontsize(2.5),
        stroke("white"),
    ),

如何注释 Gadfly 热图？

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