我如何在ggmosaic中翻转一个马赛克图？

Question

我如何在ggmosaic中翻转一个马赛克图？例如，我想要这样：

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如下所示：

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注意"present“在第一张图的顶部，在第二张图的底部。我想把“礼物”放在第一张图的底部。

数据是来自HSAUR3包的"schizophrenia2“数据集。代码如下：

#import the data set
data("schizophrenia2", package="HSAUR3")
#plot in base R
library(vcd)
colors <- c("grey", "darkred")
mosaic(disorder ~ month | onset, highlighting_fill = colors, data = schizophrenia2, main = "Presence of Thought Disorder by Onset of Disease")
#plot in ggplot2
library(ggmosaic)
ggplot(data = schizophrenia2) + 
  geom_mosaic(aes(x = product(month, onset), fill=disorder), na.rm=T) +
  labs(title="Presence of Thought Disorder by Onset of Disease", x="Onset", y="Month") + 
  coord_flip() + 
  scale_fill_discrete(guide = guide_legend(reverse=TRUE), 
                      name="Disorder", labels=c("Absent", "Present", "Dropped Out"))

注意: vcd可能会在加载ggmosaic时停止工作。我就是这么想的。但我想我只是遗漏了一些简单的代码，可以让我翻转它。

Answer 1

问题在于变量级别在ggplot2对象中的映射顺序。您可以通过重新排序onset和disorder变量来获得所需的结果。

#import the data set
data("schizophrenia2", package="HSAUR3")

#plot in ggplot2
library(ggmosaic)
library(dplyr)

schizophrenia2 %>% 
  mutate(onset = forcats::fct_relevel(onset, "> 20 yrs"),
         disorder = forcats::fct_relevel(disorder, "present")) %>% 
  ggplot() + 
  geom_mosaic(aes(x = product(month, onset), fill=disorder), na.rm=T) +
  labs(title="Presence of Thought Disorder by Onset of Disease") + 
  scale_x_productlist(name="Onset") +
  scale_y_productlist(name="Month") +
  coord_flip() +  
  scale_fill_discrete(guide = guide_legend(reverse=TRUE), 
                      name="Disorder", labels=c("Present", "Absent", "Dropped Out"))

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