如何解决R中ggplot中的标签不正确
key year flag amount pct pos
<chr> <int> <lgl> <dbl> <dbl> <dbl>
1 A 2017 TRUE 13870255. 0.487 0.244
2 A 2017 FALSE 14609185. 0.513 0.744
3 B 2017 TRUE 23562809. 0.807 0.403
4 B 2017 FALSE 5641352. 0.193 0.903
5 C 2017 TRUE 22683017. 0.772 0.386
6 C 2017 FALSE 6686562. 0.228 0.886
7 D 2017 TRUE 14840593. 0.500 0.250
8 D 2017 FALSE 14846822. 0.500 0.750
9 A 2018 FALSE 16131222. 0.485 0.242
10 A 2018 TRUE 17155225. 0.515 0.742
我创建了wrapepd染色的图，每个图内都有百分比标签-在黑框内突出显示。左上角的第一个图似乎是正确的，但是中间向上的图则具有相反的颜色-51.54％的表面小于48.46％的表面。 如何固定标签，使表面与percantage相符？
用于ggplot的代码：
ggplot(valuesDT,aes(x=1,y=pct,fill=flag)) +
geom_bar(stat="identity",width=2)+
coord_polar(theta='y')+
theme_classic()+
theme(axis.ticks=element_blank(),axis.title=element_blank(),axis.line.y = element_blank(),axis.line.x = element_blank(),axis.text.y = element_blank(),panel.grid = element_blank(),axis.text.x = element_blank(),plot.title = element_text(color="blue",size=16,face="bold")) +
scale_fill_manual(values = c("grey","green"),labels = c("F","non-T"),name = "")+
geom_text(aes(y = pos,label = paste0(round(pct*100,digits = 2)," %")),size = 3)+
facet_grid(key ~ year)
看起来不错。但是后来我注意到标签不正确
数据：
structure(list(key = c("A","A","B","C","D","D"),year = c(2017L,2017L,2018L,2019L,2019L
),flag = c(TRUE,FALSE,TRUE,FALSE),amount = c(13870254.87,14609184.5199999,23562809.1300003,5641352.16999989,22683016.61,6686562.28999991,14840593.21,14846822.3,16131221.89,17155224.79,26853512.1700003,6337822.7600002,26324941.5199999,7775499.19999981,16527294.6700001,18136429.54,18660941.7799999,19628554.06,29955135.69,7154960.09000001,28728476.97,8923411.36999992,18634207.47,18495786.62),pct = c(0.487026962857644,0.512973037142356,0.806830536509883,0.193169463490117,0.772330331573125,0.227669668426875,0.499895088711952,0.500104911288048,0.484618320635959,0.515381679364041,0.809051887386679,0.190948112613322,0.771982442577655,0.228017557422345,0.476789353904222,0.523210646095778,0.487364520493513,0.512635479506487,0.807196399265127,0.192803600734873,0.763002288506204,0.236997711493796,0.501864003124596,0.498135996875404),pos = c(0.243513481428822,0.743513481428822,0.403415268254941,0.903415268254941,0.386165165786563,0.886165165786563,0.249947544355976,0.749947544355976,0.24230916031798,0.742309160317979,0.404525943693339,0.904525943693339,0.385991221288828,0.885991221288828,0.238394676952111,0.738394676952111,0.243682260246756,0.743682260246756,0.403598199632564,0.903598199632563,0.381501144253102,0.881501144253102,0.250932001562298,0.750932001562298)),row.names = c(NA,-24L),groups = structure(list(year = c(2017L,key = c("A",.rows = structure(list(1:2,3:4,5:6,7:8,9:10,11:12,13:14,15:16,17:18,19:20,21:22,23:24),ptype = integer(0),class = c("vctrs_list_of","vctrs_vctr","list"))),12L),class = c("tbl_df","tbl","data.frame"),.drop = TRUE),class = c("grouped_df","tbl_df","data.frame"))
解决方法
尝试在group中启用key的{{1}}。在这里的代码和图中，您可以看到如何正确放置问题中提到的内容：
aes()输出：
另外，请注意如何分配标签，而无需使用library(tidyverse)
#Code
ggplot(valuesDT,aes(x=1,y=pct,fill=flag,group=key)) +
geom_bar(stat="identity",width=2)+
coord_polar(theta='y')+
theme_classic()+
theme(axis.ticks=element_blank(),axis.title=element_blank(),axis.line.y = element_blank(),axis.line.x = element_blank(),axis.text.y = element_blank(),panel.grid = element_blank(),axis.text.x = element_blank(),plot.title = element_text(color="blue",size=16,face="bold")) +
scale_fill_manual(values = c("grey","green"),labels = c("non-T","F"),name = "")+
geom_text(aes(y = pos,label = paste0(round(pct*100,digits = 2)," %")),size = 3)+
facet_grid(key ~ year)
选项，这是输出：
scale_fill_*()输出：
可以看出百分比和面积放置正确。
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