R 中使用 ggplot2 的极坐标图

Question

我正在尝试使用

ggplot2

在 R 中绘制一个简单的极坐标图，但我正在与奇怪的行为作斗争！ 这是我的数据集：

wake_loss_per_sector
   sector wake_loss angle
1       1  16.48843    30
2       2  17.59385    60
3       3  19.19244    90
4       4  27.17434   120
5       5  26.13185   150
6       6  10.95055   180
7       7  11.09595   210
8       8  14.24783   240
9       9  15.59619   270
10     10  19.09893   300
11     11  22.63984   330
12     12  15.84240     0

这是我如何尝试绘制它的：

ggplot(wake_loss_per_sector, aes(x = angle, y = wake_loss)) +
  geom_col(width = 25, fill = "skyblue", color = "black") +
  coord_polar(start = 0) +
  scale_x_continuous(
    limits = c(0, 360),
    breaks = seq(0, 330, by = 30),
    minor_breaks = NULL
  ) +
  theme_minimal()

当它运行时，它会生成警告：

Warning message:
Removed 1 rows containing missing values (`geom_col()`). 

该图如下所示，缺少扇区 12（0 度）：

任何建议都将受到高度赞赏！

Answer 1

删除

limits = c(0, 360)

：

library(ggplot2)

wake_loss_per_sector <- data.frame(
  sector = 1:12,
  wake_loss = c(16.48843, 17.59385, 19.19244, 27.17434, 26.13185, 10.95055,
                11.09595, 14.24783, 15.59619, 19.09893, 22.63984, 15.84240),
  angle = c(30, 60, 90, 120, 150, 180, 210, 240, 270, 300, 330, 0)
)

# Plot
ggplot(wake_loss_per_sector, aes(x = angle, y = wake_loss)) +
  geom_col(width = 30, fill = "skyblue", color = "black") +
  coord_polar(start = 0) +
  scale_x_continuous(
    breaks = seq(0, 330, by = 30)
  ) +
  theme_minimal() +
  labs(x = "Angle (degrees)", y = "Wake Loss", title = "Polar Plot of Wake Loss by Sector")