跨 x 轴镜像分组条

Question

这是从 rstats subreddit 交叉发布的。我见过镜像条或分组条，但没有看到镜像和分组条。我得到的最接近的是使用“堆叠”，但它似乎不适用于负值的 x 轴，而“躲避”偏移应对齐的相关条：

示例图：

我需要分别在粉色和蓝色条下方的绿色和紫色条。有谁知道这个库是否可行？这是我一直在使用的：

Input =
 "
 treatment group mean sd
 T-Above 10 9 0.6414207
 T-Above 20 3 0.2940872
 T-Above 30 2 0.7539211
 T-Above 40 1 0.5011464
 T-Above 50 7 0.3358966
 T-Below 10 -4 0.3155503
 T-Below 20 -8 0.4169761
 T-Below 30 -2 0.6381697
 T-Below 40 -8 0.7360393
 T-Below 50 -1 0.4352037
 R-Above 10 30 12.375440
 R-Above 20 32  7.122308
 R-Above 30 27  5.113855
 R-Above 40  22  4.141439
 R-Above 50  26  4.145096
 R-Below 10 -8 0.5532685
 R-Below 20 -5 0.3195736
 R-Below 30 -6 0.2738115
 R-Below 40 -2 0.3338844
 R-Below 50 -4 0.1860820"
Data = read.table(textConnection(Input),header=TRUE)

limits <- aes(ymax = Data$mean + Data$sd, ymin = Data$mean - Data$sd)

p <- ggplot(data = Data, aes(x = factor(group), y = mean, fill = treatment))

Pgraph <- p + 
          geom_bar(stat = "identity", position = position_dodge(0.9),color="#000000") + 
          geom_errorbar(limits, position = position_dodge(0.9), width = 0.25) + 
          labs(x = "x", y = "y") + 
          ggtitle("") + 
          scale_fill_discrete(name = "Treatment")

Pgraph + theme(
           panel.grid.major=element_blank(),
           panel.grid.minor=element_blank(),
           panel.background=element_rect(fill="white"), 
           panel.border=element_rect(fill=NA,color="black"))

如果我在这里忽略了现有答案，我深表歉意。

Answer 1

这个怎么样？

library(ggplot2)
library(tidyr)

limits <- aes(ymax = Data$mean + Data$sd, ymin = Data$mean - Data$sd)

Data %>% separate(treatment, c("Type", "Pos")) %>%
    ggplot(aes(x = factor(group), y = mean, group = Type, fill = interaction(Pos, Type))) +
    geom_bar(stat = "identity", position = position_dodge(0.9), color="#000000") +
    geom_errorbar(limits, position = position_dodge(0.9), width = 0.25) +
    labs(x = "x", y = "y") + 
    ggtitle("") + 
    scale_fill_discrete(name = "Treatment",
        labels = c("R-Above","R-Below", "T-Above", "T-Below")) + 
    theme(panel.grid.major=element_blank(),
        panel.grid.minor=element_blank(),
        panel.background=element_rect(fill="white"), 
        panel.border=element_rect(fill=NA,color="black"))