反向疊置條爲了

Question

我使用ggplot這樣創建堆積條形圖：

plot_df <- df[!is.na(df$levels), ] 
ggplot(plot_df, aes(group)) + geom_bar(aes(fill = levels), position = "fill") 

，給了我這樣的事情：

如何顛倒順序堆疊的酒吧本身，所以1級在底部，5級在每個酒吧的頂部？

我已經看到了一些關於這個問題（比如How to control ordering of stacked bar chart using identity on ggplot2）和常見的解決方案似乎是重新排序由該級別的數據幀作爲什麼ggplot使用確定的順序

所以我使用dplyr嘗試重新排序：

plot_df <- df[!is.na(df$levels), ] %>% arrange(desc(levels))

然而，劇情出來的一樣。它也似乎不有所作爲我無論是升序或降序

這裏安排是重複的例子：

group <- c(1,2,3,4, 1,2,3,4, 1,2,3,4, 1,2,3,4, 1,2,3,4, 1,2,3,4) 
levels <- c("1","1","1","1","2","2","2","2","3","3","3","3","4","4","4","4","5","5","5","5","1","1","1","1") 
plot_df <- data.frame(group, levels) 

ggplot(plot_df, aes(group)) + geom_bar(aes(fill = levels), position = "fill") 

Answer 1

The release notes of ggplot2 version 2.2.0 on Stacking bars suggest：

如果你想在堆棧相反的順序，儘量forcats::fct_rev()

library(ggplot2) # version 2.2.1 used  
plot_df <- data.frame(group = rep(1:4, 6), 
         levels = factor(c(rep(1:5, each = 4), rep(1, 4)))) 
ggplot(plot_df, aes(group, fill = forcats::fct_rev(levels))) + 
    geom_bar(position = "fill") 

這是原作情節：

ggplot(plot_df, aes(group, fill = levels)) + 
    geom_bar(position = "fill") 

或者，使用position_fill(reverse = TRUE)的建議通過alistaire in his comment：

ggplot(plot_df, aes(group, fill = levels)) + 
    geom_bar(position = position_fill(reverse = TRUE)) 

請注意，圖例中的級別（顏色）與堆疊酒吧中的級別不同。