ggplot2:geom_bar 具有自定义 y 限制

ggplot2: geom_bar with custom y limits

我想绘制带有 ggplot2 以及自定义 y 限制的条形图。

Type <- LETTERS[1:5]
Y    <- c(99, 99.5, 99.0, 98.8, 98.5)

df <- data.frame(Type, Y)

以下代码适用于条形图:

library(ggplot2)
ggplot(data = df, mapping = aes(x = Type, y = Y, fill = Type)) +
  geom_bar(stat = "identity") +
  theme_bw()

但是,我无法设置 y 限制。请参阅下面的代码。

ggplot(data = df, mapping = aes(x = Type, y = Y, fill = Type)) +
  geom_bar(stat = "identity") +
  scale_y_continuous(limits = c(90, 100)) + 
  theme_bw()

ggplot(data = df, mapping = aes(x = Type, y = Y, fill = Type)) +
  geom_bar(stat = "identity") +
  ylim(90, 100) + 
  theme_bw()

已编辑

我猜这种行为是由于 stat = "identity"

使用geom_rect()代替geom_bar()的解决方案:

# Generate data
Type <- LETTERS[1:5]
Y    <- c(99, 99.5, 99.0, 98.8, 98.5)
df   <- data.frame(Type, Y)

# Plot data
library(ggplot2)
ggplot() +
    geom_rect(data = df, 
              aes(xmin = as.numeric(Type) - 0.3, 
                  xmax = as.numeric(Type) + 0.3, 
                  ymin = 90, ymax = Y,
                  fill = Type)) +
    scale_x_continuous(label = df$Type, breaks = 1:nrow(df))

geom_rect()中指定x坐标为as.numeric(X) -/+ valueymin 坐标为所需下限,ymax 为实际 Y 值。

备选方案,使用 coord_cartesian:

ggplot(data = df, mapping = aes(x = Type, y = Y, fill = Type)) +
  geom_bar(stat = "identity") +
  coord_cartesian(ylim = c(90, 100)) + 
  theme_bw()

给你: