在ggplot R中打印累积功能区

Question

我想创建一个带阴影的条形图，显示累积值：

require(ggplot2)
plot_data = data.frame(period=factor(c("t_1", "t_5_to_t_2", "t_8_to_t_2", "t_11_to_t_2", "t_14_to_t_2"), levels=c("t_1", "t_5_to_t_2", "t_8_to_t_2", "t_11_to_t_2", "t_14_to_t_2")), vals = 1:5, ribbon_vals = cumsum(1:5))
ggplot(data=plot_data, aes(x=period, y=vals)) + 
geom_bar(stat="identity", colour=c("#6495ED", "#2E8B57", "#2E8B57", "#2E8B57", "#2E8B57")) + 
scale_x_discrete(labels = c('t_1' = expression(t-1), 't_5_to_t_2' = expression(t-5 %->% t-2), 't_8_to_t_2' = expression(t-8 %->% t-2), 't_11_to_t_2' = expression(t-11 %->% t-2), 't_14_to_t_2' = expression(t-14 %->% t-2))) +
geom_ribbon(aes(x=1:5, y=ribbon_vals))

这似乎不起作用。使用geom_ribbon的正确方法是什么

Answer 1

对于geom_ribbon()，您应该提供ymin和ymax值。本例中的ymin为0，ymax为ribbon_vals。geom_ribbon()行应该放在geom_bar()之前。在geom_bar()中使用fill=而不是color=来更改整个条形图的颜色(不仅仅是边框)。

ggplot(data=plot_data, aes(x=period, y=vals)) + 
  scale_x_discrete(labels = c('t_1' = expression(t-1), 't_5_to_t_2' = expression(t-5 %->% t-2), 't_8_to_t_2' = expression(t-8 %->% t-2), 't_11_to_t_2' = expression(t-11 %->% t-2), 't_14_to_t_2' = expression(t-14 %->% t-2))) +
  geom_ribbon(aes(x=1:5, ymin=0,ymax=ribbon_vals))+
  geom_bar(stat="identity",fill=c("#6495ED", "#2E8B57", "#2E8B57", "#2E8B57", "#2E8B57"))

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