在R中绘制Pie3D图

Question

我在饼图中用R绘制了一个data.frame。这是代码

library(plotrix)
piepercent<- round(100*cause_wise$suicides/sum(cause_wise$suicides), 1)
png(file = "plots/cause suicide.png")
pie3D(cause_wise$suicides,labels = piepercent,explode = 0.1, 
  main = "Suicide by Gender(in percentages)")
#legend("topright", cause, cex = 0.8, fill = rainbow(length(cause)))
dev.off()

我试图在这里绘制的data.frame有38个值，我想省略那些对piepercent没有显着贡献的值到一个大区域，比如说小于2％。有没有办法可以做到这一点？

以下是图表的外观：

Answer 1

将小于阈值的那些聚合成一个类别，然后绘制：

library(plotrix)
library(dplyr)

# dummy data
cause_wise <- data.frame(suicides = c(2, 3, 1, 50, 1, 50, 45))

# sum values where percentage is less than 2%
plotDat <- cause_wise %>% 
  mutate(grp = ifelse(suicides/sum(suicides) < 0.02, "tooSmall", row_number())) %>% 
  group_by(grp) %>% 
  summarise(suicides = sum(suicides)) %>% 
  select(-grp) %>% 
  ungroup()

# set label and color(grey for <2%)
piepercent <- round(100 * plotDat$suicides/sum(plotDat$suicides), 1)
piecol <- c(rainbow(length(piepercent) - 1 ), "grey")

# why oh why 3D pie chart...
pie3D(plotDat$suicides,
      labels = piepercent, 
      explode = 0.1,
      col = piecol,
      main = "Suicide by Gender (in percentages)")