有没有办法让 ggplot2 中的 position_jitterdodge 在使用两个数据集时按两个分类变量排序

我正试图从一个包含一个连续变量和两个分类变量的数据集中绘制一个抖动的箱线图.我将数据分为两个数据框，因为我不希望数据框2的方式包含在箱线图中，而且我希望以不同的 colored颜色 显示它们.我使用position\u jitterdodge()使点位于与其变量"b"类别对应的方框图的顶部，但它似乎不起作用.例如，所有红点都应该集中在紫色方框图上，但它们似乎分布在整个图形中.我没有足够的声誉来添加图片，但我已经在R社区页面上发布了这个问题，并添加了一张图片，看它是否有助于https://community.rstudio.com/t/position-jitterdodge-doesnt-plot-points-by-categorical-variable/137199人.如果有人知道如何解决这个问题，我将不胜感激.

#Jittered boxplot reprex

#Load packages
library(reprex)
#> Warning: package 'reprex' was built under R version 4.0.5
library(ggplot2)

#Create dataframes

df.1 <- tibble::tribble(
        ~a, ~b, ~c,
        1, "x", "n",
        2, "x", "n",
        2, "x", "m",
        3, "x", "m",
        3, "y", "n",
        1, "y", "n",
        1, "y", "m",
        2, "y", "m",
        2, "z", "n",
        3, "z", "n",
        3, "z", "m",
        1, "z", "m"
)

df.2 <- tibble::tribble(
        ~a, ~b, ~c,
        2, "z", "n",
        3, "z", "n",
        1, "z", "n",
        3, "z", "n",
        2, "z", "m",
        1, "z", "m",
        2, "z", "m",
        3, "z", "m",
)

#Make a box plot with data from df.1, with data from df.2 overlaid as a jitterplot

plot.1 <- ggplot(data = df.1, aes(x=c, y=a, fill=b)) + 
  geom_boxplot()+
  geom_jitter(data = df.2, aes(x=c, y=a), color = "red", position=position_jitterdodge(), size=2) +
  geom_jitter(position=position_jitterdodge(), size=2)+
  scale_fill_manual("b", values=c("#FFD54F","#B2EBF2","#7B1FA2"))
plot(plot.1)

由reprex package(v2.0.1)于2022年5月18日创建