R ggplot2画饼状图

library(ggplot2) type <- c('A','B','C','D','E','F','G') nums <- c(10,23,8,33,12,40,60) df <- data.frame(type = type, nums = nums) #绘制条形图 p <- ggplot(data = df, mapping = aes(x = 'Content', y = nums,

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