r - ggforce::geom_arc_bar 中的线条颜色

Question

大概是一个简单的。

有没有办法消除 ggforce::geom_arc_bar 饼图中的边界线？

pie <- data.frame(
    state = c('eaten', 'eaten but said you didn\'t', 'cat took it', 
              'for tonight', 'will decompose slowly'),
    focus = c(0.2, 0, 0, 0, 0),
    start = c(0, 1, 2, 3, 4),
    end = c(1, 2, 3, 4, 2*pi),
    amount = c(4,3, 1, 1.5, 6),
    stringsAsFactors = FALSE
)
ggplot(pie) + 
    geom_arc_bar(aes(x0 = 0, y0 = 0, r0 = 0, r = 1, amount = amount, 
                     fill = state, explode = focus), stat = 'pie') + 
    scale_fill_brewer('', palette = 'Set1') +
    coord_fixed()

例如，在上图中，要么消除黑色边框线，要么使其颜色与填充颜色相同？

还有一个问题，是否可以只从馅饼的周边消除边界线？那么只有切片的分界线会保留吗？

标签： rggplot2colorsggforce

Answer 1

您可以添加color = "transparent"或color = NA里面geom_arc_bar

代码

library(ggforce)
ggplot(pie) + 
  geom_arc_bar(aes(x0 = 0, y0 = 0, r0 = 0, r = 1, amount = amount, 
                   fill = state, explode = focus), stat = 'pie',
                   color = "transparent") + 
  scale_fill_brewer('', palette = 'Set1') +
  coord_fixed()