geom_bar 中的条形宽度不相等

对于以下数据框，我想使用以下方法绘制几个条形图ggplot.

df <- data.frame(Disease = c("Disease1","Disease2","Disease3","Disease3","Disease3","Disease4","Disease5","Disease5","Disease6","Disease4","Disease2","Disease2","Disease1","Disease7","Disease1","Disease1","Disease7","Disease6","Disease3","Disease6"),
                   Week = c(3,52,46,47,19,39,42,46,44,45,46,42,45,48,44,44,43,42,45,47),
                   Year = c(2015,2015,2015,2016,2015,2015,2016,2016,2015,2015,2015,2015,2016,2016,2016,2015,2016,2016,2016,2015),
                   Number = c(1,1,6,5,1,1,4,12,4,15,6,15,6,11,4,2,9,1,4,1))

我使用以下语法，它给出了几个条形图。

ggplot(df, aes(factor(Week), Number )) + 
  geom_bar(stat="identity" , aes(fill = factor(Year)), position = "dodge") + 
  facet_wrap(~ Disease, ncol = 2, scales = "free_y") +
  labs(x = "Week", y = "Number") +
  scale_fill_discrete(name = "Year")

但是，我希望所有条形都具有相同的宽度（有关宽度差异，请参阅疾病 1）。我已经在这里找到答案了使用facet_wrap时，geom_bar中的条形有不需要的不同宽度但我无法让它在我的示例中起作用。有人能解决我的问题吗？ 显然，我的原始数据集比上面的示例要大得多，并且不同条形宽度的问题发生的频率要高得多。

您可以通过将每个疾病 + 周 + 年填写为 0 来解决此问题：

library(tidyverse)
df2 = df %>%
    complete(Disease, Week, Year, fill = list(Number = 0))

ggplot(df2, aes(factor(Week), Number )) + 
    geom_bar(stat="identity" , aes(fill = factor(Year)), position = "dodge") + 
    facet_wrap(~ Disease, ncol = 2, scales = "free_y") +
    labs(x = "Week", y = "Number") +
    scale_fill_discrete(name = "Year")

您还可以尝试填充像 0.1 这样的小数字，这样您就会在每个 x 轴位置得到一些小条 - 我认为这可以帮助明确每个条都有一个空格，但您引入了可能令人困惑的假值：

df2 = df %>%
    complete(Disease, Week, Year, fill = list(Number = 0.1))