更改堆叠条形图中的组的顺序和R中的图例? [英] Change order of groups in stacked bar chart AND legend in R?

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问题描述

我知道这类问题已经被问到,但我已经试过将它应用到我的数据集上几个小时,但没有成功。



这里是我的数据框

 > df 
prot X nr
1未修改相同68
2 1 Ac相同14
3 2 Ac相同7
4 3相同4
5 4 Ac相同3
6 5 Ac相同2
7 6相同1
8 7相同2

我尝试了两种方法来调整组的顺序,但在这两种情况下,图例完全是相反的顺序。我怎样才能将情节中的群体的顺序与传说中的群体的顺序相匹配?
way1:

  y < -  read.csv(df.csv,sep =,) #月= ; 
df< - data.frame(y)

df $ prot< - factor(df $ prot,levels = rev(df $ prot))#order groups

p <-ggplot(df,aes(x = X,y = nr,fill = prot))+
geom_bar(stat =identity,position = position_stack(),width = 0.2,color =gray,aes(fill = prot))+#stacked,bar-width,outline-color = color
theme(panel.background = element_rect(fill =ivory,color =ivory)) +
coord_flip()+
主题(legend.position =bottom)+
guides(fill = guide_legend(nrow = 1))+
geom_text(aes(label = nr),color =black,vjust = -3,position = position_stack())#添加标签(%)不重叠


给我这个结果:



way2:

  y < - read.csv(df.csv,sep =,)#sep =; 
df < - data.frame(y)

df $ prot < - 因子(df $ prot,levels = c(7 Ac,6 Ac,5 Ac),4 Ac,3 Ac,2 Ac,1 Ac,未修改))#排序组

df < - ddply(df, ),
transform,pos = cumsum(nr) - (0.5 * nr))#调整数据标签的位置:在每个栏的中心创建新变量

p < ggplot(data = df,aes(x = X,y = nr,fill = prot))+
geom_bar(stat =identity,position = position_stack(),width = 0.2,color =gray) +#堆叠,条形宽度,轮廓颜色=颜色
主题(panel.background = element_rect(fill =ivory,color =ivory))+ #backgroundcolor
coord_flip()+
主题(legend.position =bottom)+
guides(fill = guide_legend(nrow = 1))+
geom_text(data = df,aes(x = X,y = pos, label = paste0(nr,%)),
size = 4)

p


给我这个结果:

解决方案

您只需在 guide_legend中使用 reverse 参数并将其设置为 TRUE ,例如:

  df < -  data.frame(prot = c(unmodified,paste(1:7,AC)),X = rep(same,8),
nr = c ,14,7,4,3,2,1,2))

library(ggplot2)

df $ prot < - factor(df $ prot,levels = rev(df $ prot))#order groups

p <-ggplot(df,aes(x = X,y = nr,fill = prot))+
geom_bar(stat =身份,position = position_stack(),width = 0.2,color =gray,aes(fill = prot))+#stacked,bar-width,outline-color = color
theme(panel.background = element_rect (fill =ivory,color =ivory))+
coord_flip()+
theme(legend.position =bottom)+
#改变图例排序,设置reverse = TRUE
guides(fill = guide_legend(nrow = 1,reverse = TRUE))+
geom_text(aes(label = nr),color =blac k,vjust = -3,position = position_stack())#添加标签(%)不重叠

p


I know that this kind of questions have already been asked, but I have already tried to apply it to my dataset for hours, but without success.

Here is my dataframe

> df
        prot    X nr
1 unmodified same 68
2       1 Ac same 14
3       2 Ac same  7
4       3 Ac same  4
5       4 Ac same  3
6       5 Ac same  2
7       6 Ac same  1
8       7 Ac same  2

I tried two ways of adjusting the order of the groups, but in both cases the legend is exactly in the reverse order. How can I match the order of the groups in the plot with the one in the legend? way1:

y <- read.csv("df.csv",sep=",") #sep=";"
df <- data.frame(y)

df$prot <- factor(df$prot, levels = rev(df$prot))   #order groups

p<-ggplot(df, aes(x=X, y=nr, fill=prot)) +
geom_bar(stat="identity", position=position_stack(), width=0.2, colour="gray", aes(fill = prot))+ #  stacked, bar-width, outline-colour = colour
theme(panel.background = element_rect(fill = "ivory" , colour="ivory"))+
coord_flip()+
theme(legend.position="bottom") +
guides(fill = guide_legend(nrow = 1)) +
geom_text(aes(label=nr), color="black",vjust = -3, position = position_stack())   # add labels (%) non-overlapping

p

giving me this result:

way2:

y <- read.csv("df.csv",sep=",") #sep=";"
df <- data.frame(y)

df$prot <- factor(df$prot, levels = c("7 Ac", "6 Ac", "5 Ac", "4 Ac", "3 Ac", "2 Ac", "1 Ac","unmodified"))   #order groups

df <- ddply(df, .(X),
        transform, pos = cumsum(nr) - (0.5 * nr)) #adjust the position of the data labels:create new variable at the centre of each bar 

p<-ggplot(data=df, aes(x=X, y=nr, fill=prot)) +
geom_bar(stat="identity", position=position_stack(), width=0.2, colour="gray")+ #  stacked, bar-width, outline-colour = colour
theme(panel.background = element_rect(fill = "ivory" , colour="ivory"))+ #backgroundcolor
coord_flip()+
theme(legend.position="bottom") +
guides(fill = guide_legend(nrow = 1)) +
geom_text(data=df, aes(x = X, y = pos, label = paste0(nr,"%")),
        size=4)

p

p

giving me this result:

解决方案

You just have to use the reverse parameter in guide_legend and set it to TRUE, such as:

df<- data.frame(prot = c("unmodified", paste(1:7, "AC")), X = rep("same", 8),
                   nr = c(68,14,7,4,3,2,1,2))

library(ggplot2)

df$prot <- factor(df$prot, levels = rev(df$prot))   #order groups

p<-ggplot(df, aes(x=X, y=nr, fill=prot)) +
        geom_bar(stat="identity", position=position_stack(), width=0.2, colour="gray", aes(fill = prot))+ #  stacked, bar-width, outline-colour = colour
        theme(panel.background = element_rect(fill = "ivory" , colour="ivory"))+
        coord_flip()+
        theme(legend.position="bottom") +
        # to change ordering of legend, set reverse = TRUE
        guides(fill = guide_legend(nrow = 1, reverse = TRUE)) +
        geom_text(aes(label=nr), color="black",vjust = -3, position = position_stack())   # add labels (%) non-overlapping

p

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