在geom_point图中添加大于或小于0的点计数注释 [英] Add annotation of count of points greater or lower than 0 in geom_point plot

问题描述

全部！

我已经成功地使用ggplot2生成了如下图，该图具有每个组中的总点数.如果要分别添加大于或小于0的点数，该怎么做?

I have managed to produce a plot like below using ggplot2 which have the total number of points in each group. If I want to add the number of points greater or lower than 0 separately, how can that be done?

谢谢！

give.n <- function(x){ 
  return(c(y = 10, label = length(x)))
  }


ggplot(dta, aes(x=type, y=foldChange, fill=grp)) +       
  geom_point(size=1,alpha=0.2,position = position_jitterdodge(jitter.width = .2),aes(col=grp)) + 
  geom_boxplot(alpha=0,outlier.shape=NA) + guides(fill=FALSE) + theme_bw() + xlab("") +
  geom_hline(yintercept = 0,col="red") +
  stat_summary(fun.data = give.n, geom = "text", fun.y = median, position = position_dodge(width = 0.75))

推荐答案

您可以在ggplot函数内部进行子集化，以绘制所需的内容.在您的情况下，如果您想要的值> 0

You can subset inside ggplot functions in order to plot whatever you want. In your case it would look like this if you wanted values > 0

ggplot(subset(dta, foldChange > 0), aes(x=type, y=foldChange, fill=grp))

我不确定您稍后再添加点到底是什么意思，但这至少应该过滤掉您想要的点.

I'm not sure what you mean exactly by adding the points later, but this should at least filter the points you desire.

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