问题描述
我一直在尝试创建一个堆积的条形图,该图的颜色与地图中的颜色有关。基本上,我具有给定多边形覆盖的面积比例。我已经预先对 df 进行了排序,因此每个Proportion
的堆栈Class
的降序排列。如果将fill的值设置为一个连续变量,即Cluster
(但是我不能更改堆栈的特定颜色),并且将它们转换为因子Clu
,则堆栈的顺序丢失了,或者我可以设法对它们进行排序,但是对于整个图形,不是每个类...相同的Cluster
可以出现在不同的类中,即集群 Two
Num Class Cluster Proportion Clu Order consec
1 9 Class_9 2 0.859 Two 1 1
2 9 Class_9 5 0.141 Five 2 2
3 10 Class_10 2 0.622 Two 1 3
4 10 Class_10 1 0.179 One 2 4
5 10 Class_10 7 0.165 Seven 3 5
6 10 Class_10 6 0.034 Six 4 6
7 11 Class_11 7 1.000 Seven 1 7
8 12 Class_12 2 0.571 Two 1 8
9 12 Class_12 8 0.289 Eight 2 9
10 12 Class_12 1 0.140 One 3 10
11 13 Class_13 8 0.581 Eight 1 11
12 13 Class_13 4 0.210 Four 2 12
13 13 Class_13 2 0.112 Two 3 13
14 13 Class_13 3 0.079 Three 4 14
15 13 Class_13 5 0.018 Five 5 15
我已经设法在代码上走了这么远。
cols<-c(One='Blue',Two='Red',Three='Yellow',Four='lightblue',Five='darkgrey',Six='Black',Seven='cyan',Eight='Green')
ggplot(Tx,aes(x=Class,y=Proportion,fill= Clu)) +
geom_col(width = .7,colour="black",lwd=0.1) +
geom_text(aes(label=ifelse(Proportion >= 0.05,sprintf("%.2f",Proportion),"")),position=position_stack(vjust=0.5),colour="white") +
coord_flip() +
scale_y_continuous(labels = function(y) paste0(y))+
scale_fill_manual(values = cols)+
labs(y="",x="")
总而言之,我想为每个类创建一个图,其中比例按升序排列,但要为每个聚类指定颜色
解决方法
一种选择(与您的想法有所不同)是使用position.dodge
和tidytext::reorder_within
。
library(tidyverse)
library(tidytext)
cols<-c('Blue','Red','Yellow','lightblue','darkgrey','Black','cyan','Green')
Tx %>%
mutate(Cluster2 = reorder_within(Cluster,Proportion,Class)) %>%
ggplot(aes(Cluster2,fill = as.factor(Cluster))) +
geom_col(position = position_dodge2(preserve = "single")) +
scale_x_reordered() +
scale_fill_manual(values = cols) +
coord_flip() +
facet_grid(Class~.,scales = 'free_y',space = 'free')
如果您确实需要具有不同顺序的堆叠条形图,则另一个选择是分别为每个类生成图(这允许正确的顺序),然后将它们重新堆叠在一起。可以使用cowplot::plot_grid
和cowplot::get_legend
来完成。
以正确的顺序生成地块列表,并将其堆叠到一个地块中。
library(tidyverse)
library(cowplot)
Tx2 <- Tx %>%
mutate(Cluster = factor(Cluster))
cols<-c(One='Blue',Two='Red',Three='Yellow',Four='lightblue',Five='darkgrey',Six='Black',Seven='cyan',Eight='Green')
p_list <- lapply(unique(Tx2$Class),function(x){
p <- Tx2 %>%
filter(Class == x) %>%
ggplot(aes(Class,fill = reorder(Clu,-Proportion))) +
geom_col(color = 'black') +
geom_text(aes(label=ifelse(Proportion >= 0.05,sprintf("%.2f",Proportion),"")),position=position_stack(vjust=0.5),color = 'white') +
coord_flip() +
scale_fill_manual(values = cols) +
labs(x = NULL,y = NULL) +
theme_minimal() +
theme(legend.position = 'none')
if (x != 'Class_13') p <- p + theme(axis.text.x = element_blank())
p
})
p_col <- plot_grid(plotlist = p_list,ncol = 1,align = 'v',rel_heights = c(rep(1,4),1.2))
生成要使用的图例。
p <- ggplot(Tx2,aes(Class,as.numeric(Cluster)))) +
geom_col(color = 'black') +
scale_fill_manual(values = cols,labels= 1:8,name = 'Cluster')
l <- cowplot::get_legend(p)
将堆积的图和图例放在一起。
plot_grid(p_col,l,rel_widths = c(3,.4))
数据
Tx <- read.table(text =
' Num Class Cluster Proportion Clu Order consec
1 9 Class_9 2 0.859 Two 1 1
2 9 Class_9 5 0.141 Five 2 2
3 10 Class_10 2 0.622 Two 1 3
4 10 Class_10 1 0.179 One 2 4
5 10 Class_10 7 0.165 Seven 3 5
6 10 Class_10 6 0.034 Six 4 6
7 11 Class_11 7 1.000 Seven 1 7
8 12 Class_12 2 0.571 Two 1 8
9 12 Class_12 8 0.289 Eight 2 9
10 12 Class_12 1 0.140 One 3 10
11 13 Class_13 8 0.581 Eight 1 11
12 13 Class_13 4 0.210 Four 2 12
13 13 Class_13 2 0.112 Two 3 13
14 13 Class_13 3 0.079 Three 4 14
15 13 Class_13 5 0.018 Five 5 15')