【R】饼图

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pie(x, labels, radius, main, col, clockwise)

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# Create data for the graph.
x <- c(11, 30, 39, 20)
labels <- c("70后", "80后", "90后", "00后")

# Give the chart file a name.
png(file = "birth_of_age.jpg")

# Plot the chart.
pie(x,labels)

# Save the file.
dev.off()

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library(ggplot2) 
dt = data.frame(A = c(2, 7, 4, 10, 1), B = c('B','A','C','D','E')) 
dt = dt[order(dt$A, decreasing = TRUE),] myLabel = as.vector(dt$B) myLabel = paste(myLabel, "(", round(dt$A / sum(dt$A) * 100, 2), "%)", sep = "") 
p = ggplot(dt, aes(x = "", y = A, fill = B)) + geom_bar(stat = "identity", width = 1) + coord_polar(theta = "y") + labs(x = "", y = "", title = "") + theme(axis.ticks = element_blank()) + theme(legend.title = element_blank(), legend.position = "top") + scale_fill_discrete(breaks = dt$B, labels = myLabel) + theme(axis.text.x = element_blank()) + geom_text(aes(y = A/2 + c(0, cumsum(A)[-length(A)]), x = sum(A)/20, label = myLabel), size = 5) ## 在图中加上百分比：x 调节标签到圆心的距离, y 调节标签的左右位置 
p