想要:facet_grid - facet_wrap混合解决方案

时间:2015-06-24 10:05:34

标签: r ggplot2 facet facet-wrap

我正试图用一种混合物制作一个情节" facet_grid和facet_wrap之间的布局:

示例:

library(reshape2)
library(ggplot2)

data(diamonds)

# sample and reshape diamond dataset
diamonds_l <- melt(diamonds[sample(1:nrow(diamonds), 200), 
                            c("cut", "depth", "table", "price", "x")],
                   id.vars = c("cut","x"))

这是我想要的情节安排(列和深度,表格,价格为行的质量)

ggplot( diamonds_l, aes( x = value, y = x, colour= cut))+
  geom_point( ) +
  facet_wrap( variable ~  cut, scales = "free_x", nrow=3) 

enter image description here

但是,我更喜欢facet_grid设计(每列/每行只有一个标题) 但是scale =&#34; free_x&#34;不适用于此布局

ggplot( diamonds_l, aes( x = value, y = x, colour= cut))+
  geom_point( ) +
  facet_grid(variable ~  cut, scales = "free_x") 

enter image description here

它在这里工作,但那不是我想要的安排(质量如行)

ggplot( diamonds_l, aes( x = value, y = x, colour= cut))+
  geom_point( ) +
  facet_grid(cut ~ variable, scales = "free_x")

enter image description here

我明白为什么它不会起作用,但我想知道是否有解决方法?

谢谢!

费边

1 个答案:

答案 0 :(得分:3)

经过一番挖掘,我成功地完成了这一操作。从here(@ baptiste,@ Roland)和here(@Sandy Muspratt)借来的代码片段。看起来很可怕,但我基本上是通过低级操作从你的第一个图中删除/重命名文本条。

p <- ggplot( diamonds_l, aes( x = value, y = x, colour= cut))+
  geom_point( ) +
  facet_wrap( variable ~ cut, scales = "free_x", nrow = 3) 

library(gridExtra)
gt <- ggplotGrob(p)
panels <- grep("panel", gt$layout$name)
top <- unique(gt$layout$t[panels])
gt <- gt[-(top[-1]-1), ]

gg <- gt$grobs      
strips <- grep("strip_t", names(gg))
labels <- levels(diamonds_l$cut)
for(ii in seq_along(labels))  {
  modgrob <- getGrob(gg[[strips[ii]]], "strip.text", 
                     grep=TRUE, global=TRUE)
  gg[[strips[ii]]]$children[[modgrob$name]] <- editGrob(modgrob,label=labels[ii])
}
gt$grobs <- gg
grid.newpage()
grid.draw(gt)

enter image description here