条形图添加百分比 [英] Barplot -adding percentages
本文介绍了条形图添加百分比的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
所以我有这个数字变量,它们反映了百分比
So i have this numeric variables which reflect percentages
data1.pct<-19
data2.pct<-5
data3.pct<-76
class1.pct<-35
class2.pct<-18
class3.pct<-47
现在我正在使用此代码来生成barplot
Now i am using this code to generate barplot
CairoPDF(paste('data1/', data, '_plot1.pdf', sep=''), family='sans', pointsize=9, width=6, height=3.25)
par(mar=(c(4, 4, 1, 13) + 0.1), mgp=c(3, 2, 0), xpd=TRUE)
barplot(cbind(
c(data1.pct, data2.pct, data3.pct),
c(class1.pct, class2.pct, class3.pct)), col=c("firebrick3", "dodgerblue3", "mistyrose1"), ylim=c(0,100), space=c(0,1)
)
legend("topright", inset=c(-0.55, 0), legend=c("not attend", "refused", "attend"), col=c("mistyrose1", "dodgerblue3", "firebrick3"), lty=1, lwd=2, bty='n')
dev.off()
,结果是
我想在条形图中添加相应的百分比,即变量中的数字/百分比.所以我的输出应该是:
我想使用barplot函数来完成此操作,并且不 ggplot2
I would like to use barplot funcion to do this and NOT ggplot2
我尝试用来添加百分比
text(mydata, 0, round(data1.pct), 1),cex=1,pos=3) but this is not right.
推荐答案
要获取文本的y值,可以使用cumsum
以及tail
和head
来获取每个条形区域的中点
To get the y-values for the text, you can use cumsum
along with tail
and head
to get the midpoints of each bar section.
par(mar=(c(4, 4, 1, 13) + 0.1), mgp=c(3, 2, 0), xpd=TRUE)
## Make the matrix for barplot
mat <- cbind(c(data1.pct, data2.pct, data3.pct), c(class1.pct, class2.pct, class3.pct))
## Get the y-values for text
ys <- apply(mat, 2, function(x) c(x[1]/2, head(cumsum(x),-1) + tail(x,-1)/2))
## Make barplot, store x data
xs <- barplot(mat, col=c("firebrick3", "dodgerblue3", "mistyrose1"), ylim=c(0,100), space=c(0,1))
## Add text
text(rep(xs, each=nrow(ys)), c(ys), labels=c(mat))
legend("topright", inset=c(-0.55, 0), legend=c("not attend", "refused", "attend"), col=c("mistyrose1", "dodgerblue3", "firebrick3"), lty=1, lwd=2, bty='n')
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