更改 ggfortify::autoplot 创建的 ggplot 的分面标签

Change facet labels for a ggplot created by ggfortify::autoplot

我正在尝试更改 stl 分解图的分面标签,如下所示:

library(ggplot2)
library(ggfortify)
p <- autoplot(stl(AirPassengers, s.window = 'periodic'), ts.colour = "black", ts.size = 0.2)
p

剧情来源于ggfortify package。 我希望将分面标签更改为:

c("Original Data", "Seasonal component", "Trend component", "Remainder")

我试图进入 ggplot 的结构(很多 string),发现下面存储了这些名称:

str(p$layers[[1]]$data$variable)
# Factor w/ 4 levels "Data","seasonal",..: 1 1 1

但是,当我就地更改这个因素时。我得到四个空图,然后是正确的图:

p$layers[[1]]$data$variable <- factor(p$layers[[1]]$data$variable,
                                      labels=c("Original series", "Seasonal Component", "Trend component", "Remainder"))    

如何在顶部不显示这些空图的情况下更改构面标签?

一种可能是更改绘图对象的相关组件。

# generate plot data which can be rendered
g <- ggplot_build(p)

# inspect the object and find the relevant element to be changed
# str(g)

# perform desired changes
g$panel$layout$variable <- c("Original Data", "Seasonal component", "Trend component", "Remainder")

# build a grob and 'draw' it
grid.draw(ggplot_gtable(g))