如何在 Plots.jl 中为多个绘图提供共享标题

Question

我正在尝试在网格中绘制几个相关的图，我想给出一个共享的标题。但是，当我使用 plot(plot1, plot2, title="my title") Plots.jl 标题时，每个单独的图都带有该标题。有办法解决这个问题吗？

我用 gr() 和 plotly() 后端测试了下面的代码。两者具有相同的行为。

    using Plots
    using DataFrames

    gr()  # plotly() backend has the same behavior
    
    anscombes_quartet = DataFrame([
    10.0    8.04    10.0    9.14    10.0    7.46    8.0     6.58
    8.0     6.95    8.0     8.14    8.0     6.77    8.0     5.76
    13.0    7.58    13.0    8.74    13.0    12.74   8.0     7.71
    9.0     8.81    9.0     8.77    9.0     7.11    8.0     8.84
    11.0    8.33    11.0    9.26    11.0    7.81    8.0     8.47
    14.0    9.96    14.0    8.10    14.0    8.84    8.0     7.04
    6.0     7.24    6.0     6.13    6.0     6.08    8.0     5.25
    4.0     4.26    4.0     3.10    4.0     5.39    19.0    12.50
    12.0    10.84   12.0    9.13    12.0    8.15    8.0     5.56
    7.0     4.82    7.0     7.26    7.0     6.42    8.0     7.91
    5.0     5.68    5.0     4.74    5.0     5.73    8.0     |6.89 
    ])
    
    rename!(anscombes_quartet, ["x1", "y1", "x2", "y2", "x3", "y3", "x4", "y4"])
    
    plot(
        scatter(anscombes_quartet.x1, anscombes_quartet.y1, label=""),
        scatter(anscombes_quartet.x2, anscombes_quartet.y2, label=""),
        scatter(anscombes_quartet.x3, anscombes_quartet.y3, label=""),
        scatter(anscombes_quartet.x4, anscombes_quartet.y4, label=""),
        title = "Anscombes quartet"
    )

Answer 1

我找到了一个 hacky 解决方案，它使用了一个空白图：

    using Plots: grid
    
    # make "title plot" really shallow
    l = @layout [
    a{0.001h}; grid(2,2)
    ]
    
    plot(
        plot(title="test", grid=false, showaxis = false, ticks = false),
        scatter(anscombes_quartet.x1, anscombes_quartet.y1, label=""),
        scatter(anscombes_quartet.x2, anscombes_quartet.y2, label=""),
        scatter(anscombes_quartet.x3, anscombes_quartet.y3, label=""),
        scatter(anscombes_quartet.x4, anscombes_quartet.y4, label=""),
        title = ["Anscombes quartet" "A"  "B"  "C"  "D"],
        titlelocation   = :left,
        titlefonthalign = :left,  # fixes plotly() text alignment
        layout = l
    )

此解决方案的一个缺点是它不允许您单独调整“主标题”，因为它只是另一个副标题。有关网格结构的更多信息，请参阅 docs.

如果有人知道更好的解决方案，请告诉我，我很乐意接受它而不是我自己的。

Answer 2

不在 Plots.jl 但在 PyPlot.jl

    using PyPlot
    
    figure, axis = PyPlot.subplots(2, 2, constrained_layout = true) 

    axis[1,1].scatter(anscombes_quartet.x1, anscombes_quartet.y1)
    axis[1,1].set_title("A", loc="left") 
    axis[1,2].scatter(anscombes_quartet.x2, anscombes_quartet.y2)
    axis[1,2].set_title("B", loc="left") 
    axis[2,1].scatter(anscombes_quartet.x3, anscombes_quartet.y3)
    axis[2,1].set_title("C", loc="left") 
    axis[2,2].scatter(anscombes_quartet.x4, anscombes_quartet.y4)
    axis[2,2].set_title("D", loc="left") 
    
    suptitle("Anscombes quartet")
    gcf()  # or show()

如何在 Plots.jl 中为多个绘图提供共享标题

How to give multiple plots a shared title in Plots.jl

plot

julia

plots.jl