从以百分比为标签的计数列创建饼图

Question

我创建了一个包含 1 列值计数的列表：

ataques_tot <- count(t1$attacktype1_txt)
ataques_tot
                               x  freq
1                  Armed Assault 40223
2                  Assassination 18402
3              Bombing/Explosion 83073
4 Facility/Infrastructure Attack  9581
5                      Hijacking 11733
6                Unarmed Assault   913
7                        Unknown  6425

我想用百分比而不是计数来制作饼图。我试图将该列表带到 df，然后使用类似这样的东西：

ggpie(ataques_tot, "value", label = "group",
  fill = "group", color = "white")

但我很挣扎，也许这个选项已经在 ggplot2 上实现了......

我也试过这个：

pie <- ggplot(t1, aes(x = factor(1), fill = factor(attacktype1_txt))) +
  geom_bar(width = 1)
pie + coord_polar(theta = "y")

但它给了我一个计数，而不是分类变量的百分比。之后，我只需要为情节命名即可。

Answer 1

计算百分比：

d$perc <- round(100 * d$freq / sum(d$freq))

然后绘制：

ggplot(data = d, aes(x = 0, y = freq, fill = x)) + 
  geom_bar(stat = "identity") +
  geom_text(aes(label = perc), position = position_stack(vjust = 0.5)) +
  scale_x_continuous(expand = c(0,0)) +
  labs(fill = 'Type', x = NULL, y = NULL, title = 'Deaths', subtitle = 'in perventages') +
  coord_polar(theta = "y") +
  theme_minimal()

给出：

---

使用过的数据：

d <- structure(list(x = c("Armed Assault", "Assassination", "Bombing/Explosion", "Facility/Infrastructure Attack", "Hijacking", "Unarmed Assault", "Unknown"),
                    freq = c(40223L, 18402L, 83073L, 9581L, 11733L, 913L, 6425L)),
               .Names = c("x", "freq"), class = "data.frame", row.names = c(NA, -7L))