本文介绍了在多个图中添加单独的箭头的处理方法,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 29岁程序员,3月因学历无情被辞! 我想在用ggplot和faceting生成的2个图中添加箭头。问题:如何避免两个图形中箭头的复制?我想添加个别箭头到每个情节。 这里是一个例子: pre $ library $ g $ $假数据$ b $ (x = rep(1:10,2),y = c(2 * c(1:10)+ rnorm(10,0,3),4 * c 1:10)+ rnorm(10,0,5)),z = rep(c(A,B),each = 10)) xdf #ggplot with faceting xp< - ggplot(xdf,aes(x = x,y = y))+ geom_line()+ facet_grid(。〜 z) xp #箭头的位置:x = 4,y =在顶部 (f1x4 xp + geom_segment(aes(x = 4,xend = 4,y = f1x4 + 3,yend = f1x4),arrow =箭头(长度=单位(0.4,cm )))+ geom_text(aes(x = 4,y = f1x4 + 5,label =a)) pre> 发生了什么:箭头位于同一区域的两个面内。我怎么能选择一个特定的阴谋放置箭头?解决方案据我可以告诉,要添加个别图层到您需要提供具有相应构面值的数据框。 从 ggplot2 facet_grid页面: #如果将多面数据集与缺少这些#facetting变量的数据集,数据将在缺失的#组合中重复: 因此,只要做 xp + geom_segment(aes(x,xend,y,yend))会画出所有方面,因为缺少了构面变量。 您的facetting变量是 z ,所以您可以: 使用 x , arrow.df c> y 和 z 为'A' 提供 z 转换为 aes 可怕 第二个选项似乎更方便: xp + geom_segment(aes(x = 4,xend = 4,y = f1x4 + 3,yend = f1x4,z ='A')#< - 见z ='A' ,arrow = arrow(length = unit(0.4,cm)))+ geom_text(aes(x = 4,y = f1x4 + 5,label =a, z ='A'))#< - 见z ='A' 只需在 aes 参数中添加一个 factorvariablename = factor 来在该特定面板上绘图(因为您的 xp 的级别为'A'和'B')。I want to add arrows in 2 plots produced with ggplot and faceting. Problem: how can I avoid a replication of the arrow in both graphs? I would like to add individual arrows to each plot.Here is an example:library(ggplot2)# data frame with fake dataxdf <- data.frame(x=rep(1:10,2) ,y=c( 2*c(1:10)+rnorm(10,0,3), 4*c(1:10)+rnorm(10,0,5)) ,z=rep(c("A","B"),each=10) )xdf# ggplot with faceting xp <- ggplot(xdf,aes(x=x,y=y)) + geom_line() + facet_grid(. ~ z) xp# location of the arrow: x=4, y= on the top(f1x4 <- xdf[4,"y"])+1xp + geom_segment(aes(x=4,xend=4,y=f1x4+3,yend=f1x4) , arrow=arrow(length=unit(0.4,"cm") ) ) + geom_text(aes(x=4,y=f1x4+5, label="a"))What happened:arrow is placed in both facets in the identical region. How can I choose a specific plot to place the arrows? 解决方案 As far as I can tell, to add individual layers onto a facet, you need to supply a data frame with the corresponding facet value.From the ggplot2 facet_grid page:# If you combine a facetted dataset with a dataset that lacks those# facetting variables, the data will be repeated across the missing# combinations:So just doing xp + geom_segment(aes(x,xend,y,yend)) will draw on all facets, because the facetting variable is missing.Your facetting variable is z, so you can either:create a dataframe arrow.df with x, y, and z being 'A'feed the z into aes directly.Second option seems handier:xp + geom_segment(aes(x=4,xend=4,y=f1x4+3,yend=f1x4,z='A') # <-- see the z='A' , arrow=arrow(length=unit(0.4,"cm") ) ) + geom_text(aes(x=4,y=f1x4+5, label="a",z='A')) # <-- see the z='A'So you just add in a factorvariablename=factor to the aes argument to plot on that particular panel (since your z column in the data frame for xp has levels 'A' and 'B'). 这篇关于在多个图中添加单独的箭头的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持! 上岸,阿里云! 09-05 01:40