R 确定ggplot2打印区域的宽度

我尝试使用gridExtra组合两个ggplot2条形图（坐标翻转，以便标签占据水平空间）。问题是有些标签很短，有些标签很长。我希望左右列的宽度相同，而与标签的宽度无关。下面是一个例子：

library(ggplot2)
library(gridExtra)

datashort <- data.frame(ecks = c("Short1", "Short2", "Short3"), why = c(30, 20, 40))
datalong <- data.frame(ecks = c(paste0("Really, Really, Really, Really Long", c(1:3))), 
                       why = c(20, 30, 40))

plotshort <- ggplot(data = datashort, aes(x = ecks, y = why, width = .5)) +
  geom_bar(stat = "identity") +
  scale_y_continuous(breaks = c(10, 20, 30, 40, 50), limits = c(0, 50)) +
  coord_flip()

plotlong <- ggplot(data = datalong, aes(x = ecks, y = why, width = .5)) +
  geom_bar(stat = "identity") +
  scale_y_continuous(breaks = c(10, 20, 30, 40, 50), limits = c(0, 50)) +
  coord_flip()

grid.arrange(plotshort, plotlong, ncol = 2)

库（ggplot2）
图书馆（gridExtra）
datashort一个非常简单的解决方案是使用
cowplot
：

cowplot::plot_grid(plotshort, plotlong, ncol = 2,align = "v")


参数
align
允许您将打印区域设置为相等

或者，另一种选择是在标题中添加一些分隔符：

library(stringr)

plotlong <- datalong %>%
    mutate(ecks = str_replace_all(ecks, "[[:punct:]]\\s|\\s", "\\\n")) %>% 
    ggplot(aes(x = ecks, y = why, width = .5)) +
    geom_bar(stat = "identity") +
    scale_y_continuous(breaks = c(10, 20, 30, 40, 50), limits = c(0, 50)) +
    coord_flip()

cowplot::plot_grid(plotshort, plotlong, ncol = 2,align = "v")

您可以使用
stringr
包装标签，并修改
ggplot2
脚本以在
st\u wrap
中定义标签，并以
scale\u x\u discrete
方式打印：

library(stringr)    

plotshort <- ggplot(data = datashort, aes(x = ecks, y = why, width = .5)) +
  geom_bar(stat = "identity") + coord_flip() +
  scale_x_discrete(labels = str_wrap(c("Short1", "Short2", "Short3"), width = 10))  

plotlong <- ggplot(data = datalong, aes(x = ecks, y = why, width = .5)) +
    geom_bar(stat = "identity") + coord_flip() +
    scale_x_discrete(labels = str_wrap(c("Really, Really, Really, Really Long1", "Really, Really, Really, Really Long2", "Really, Really, Really, Really Long3"), width = 10))  

grid.arrange(plotshort, plotlong, ncol = 2)

库（stringr）
plotshort您可以使用
egg:：ggarrange
查看此帖子：。另外，如果在生成绘图之前将标签分成多行，可能会有所帮助：
datalong$ecks这对这些数据很有效，但我正在处理的实际数据约有70行，因此包装它们并不方便。另外，这仍然不能使绘图区域大小相等，它只是避免了一些挤压。我将使用cowplot解决方案。谢谢
library(stringr)    

plotshort <- ggplot(data = datashort, aes(x = ecks, y = why, width = .5)) +
  geom_bar(stat = "identity") + coord_flip() +
  scale_x_discrete(labels = str_wrap(c("Short1", "Short2", "Short3"), width = 10))  

plotlong <- ggplot(data = datalong, aes(x = ecks, y = why, width = .5)) +
    geom_bar(stat = "identity") + coord_flip() +
    scale_x_discrete(labels = str_wrap(c("Really, Really, Really, Really Long1", "Really, Really, Really, Really Long2", "Really, Really, Really, Really Long3"), width = 10))  

grid.arrange(plotshort, plotlong, ncol = 2)