小编给大家分享一下如何使用ggplot2绘制堆叠柱状图，相信大部分人都还不怎么了解，因此分享这篇文章给大家参考一下，希望大家阅读完这篇文章后大有收获，下面让我们一起去了解一下吧！
绘制堆叠柱状图，重点重点在于geom_bar中postion="stack"，
dat type Sample Num 1 A sample1 90 2 B sample1 34 3 C sample1 56 4 D sample1 99 5 E sample1 15 6 A sample2 50 7 B sample2 20 8 C sample2 24 9 D sample2 70 10 E sample2 14
绘图部分将geom_bar(position="stack")设置成堆叠类型可以生成堆叠的柱状图，默认fill的顺序是”Sample“因子的顺序，如果不是有序因子一般是字母排序的顺序。
p = ggplot(dat, aes(x = type,y = Num,fill = Sample))+
geom_bar(stat ="identity",width = 0.6,position ="stack")+
scale_fill_manual(values = c("red","blue"))+
labs(x = "",y = "", title = "test")+
geom_text(aes(label = dat$Num),position=position_stack(vjust =0.5),size = 5)+
guides(fill = guide_legend(reverse = F))+
theme(plot.title = element_text(size = 25,face = "bold", vjust = 0.5, hjust = 0.5),
legend.title = element_blank(),
legend.text = element_text(size = 18, face = "bold"),
legend.position = 'right',
legend.key.size=unit(0.8,'cm'))
print(p)
反向堆叠操作position_stack(reverse=T)
p = ggplot(dat, aes(x = type,y = Num,fill = Sample))+
geom_bar(stat ="identity",width = 0.6,position =position_stack(reverse = T))+
scale_fill_manual(values = c("red","blue"))+
labs(x = "",y = "", title = "test")+
geom_text(aes(label = dat$Num),position=position_stack(reverse =T,vjust =0.5),size = 5)+
guides(fill = guide_legend(reverse = F))+
theme(plot.title = element_text(size = 25,face = "bold", vjust = 0.5, hjust = 0.5),
legend.title = element_blank(),
legend.text = element_text(size = 18, face = "bold"),
legend.position = 'right',
legend.key.size=unit(0.8,'cm'))
print(p)
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