r - 使用 ggplot2 嵌套分面图

Question

如果我有一个嵌套因素，在这种情况下，我有多个包含在因素“订单”中的“家庭”级别，我想可能创建一个

facet_grid(Family / Order ~.)

而不是当前

facet_grid(Family + Order ~.) 

基本上——每个订单一个 strip ——旁边包含该订单内每个家庭的所有 strip 。我知道 facet_grid(Family/Order ~.) 目前是不可能的，但是我将如何实现这种效果？可以用 theme() 来完成吗？非常感谢。 --SB

我应该在上面指出家庭和秩序都是因素。数据值 B 是按物种分类的，这些物种具有它们所属的家族级别和订单级别。这是我的情节的代码:

p <- ggplot(models, aes(B,Species)) + geom_point() + facet_grid(Family + Order ~
 .,scales="free",space="free")

以下是一些示例数据:

structure(list(Species = c("Acanthocyclops robustus", "Acroperus harpae", 
"Alona affinis", "Ascaphus truei", "Bosmina longirostris"), Intercept = c(-36.1182388331068, 
-27.2140776216155, -25.7920464721491, -39.2233884219763, -31.4301301084581
), B = c(0.919397836908493, 0.716601987210452, 0.685455190113372, 
1.04159758611351, 0.81077051300147), Bconf = c(0.407917065756464, 
0.181611850119198, 0.254101713856315, 0.708582768458448, 0.234313394549538
), Order = c("Cyclopoida", "Diplostraca", "Diplostraca", "Anura", 
"Diplostraca"), Family = c("Cyclopidae", "Chydoridae", "Chydoridae", 
"Leiopelmatidae", "Bosminidae")), .Names = c("Species", "Intercept", 
"B", "Bconf", "Order", "Family"), row.names = c(NA, 5L), class = "data.frame")

Answer 1

使用 facet_grid或 facet_wrap不会构建您正在尝试构建的图形。但是，您可以构建图形列表，然后通过 gridExtra::grid.arrange 绘制它们。 .这是一个例子

library(ggplot2)
library(gridExtra)
library(dplyr)

dat <-
  structure(list(Species = c("Acanthocyclops robustus", "Acroperus harpae", 
  "Alona affinis", "Ascaphus truei", "Bosmina longirostris"), Intercept = c(-36.1182388331068, 
  -27.2140776216155, -25.7920464721491, -39.2233884219763, -31.4301301084581
  ), B = c(0.919397836908493, 0.716601987210452, 0.685455190113372, 
  1.04159758611351, 0.81077051300147), Bconf = c(0.407917065756464, 
  0.181611850119198, 0.254101713856315, 0.708582768458448, 0.234313394549538
  ), Order = c("Cyclopoida", "Diplostraca", "Diplostraca", "Anura", 
  "Diplostraca"), Family = c("Cyclopidae", "Chydoridae", "Chydoridae", 
  "Leiopelmatidae", "Bosminidae")), .Names = c("Species", "Intercept", 
  "B", "Bconf", "Order", "Family"), row.names = c(NA, 5L), class = "data.frame")

dat

# A ggplot object with NO data.  Omit the order from the facet_grid call
g <- 
  ggplot() +
  aes(Species, B) +
  geom_point() +
  facet_grid(. ~ Family,
             scales = "free", space = "free") +
  ylim(range(dat$B)) +
  xlab("")

# Build a seperate graphic for each Order and title
plots <-
  lapply(unique(dat$Order), function(o) {
           g %+% dplyr::filter_(dat, ~ Order == o) + ggtitle(o)
             })

# build as Grobs and plot via gridExtra::grid.arrange
plots %>%
  lapply(ggplotGrob) %>%
  arrangeGrob(grobs = .) %>%
  grid.arrange(., ncol = 1)