R语言中的横向数据合并merge及纵向数据合并rbind的使用

 我们经常会遇到两个数据框拥有相同的时间或观测值，但这些列却不尽相同。处理的办法就是使用

merge(x, y ,by.x = ,by.y = ,all = ) 函数。

#合并

ID<-c(1,2,3,4)

name<-c("A","B","C","D")

score<-c(60,70,80,90)

student1<-data.frame(ID,name)

student2<-data.frame(ID,score)

total_student1<-merge(student1,student2,by="ID")

total_student1

#横向追加

ID<-c(1,2,3,4)

name<-c("A","B","C","D")

score<-c(60,70,80,90)

sex<-c("M","F","M","M")

student1<-data.frame(ID,name)

student2<-data.frame(score,sex)

total_student2<-cbind(student1,student2)

total_student2

 

#纵向追加

ID<-c(1,2,3,4)

name<-c("A","B","C","D")

student1<-data.frame(ID,name)

ID<-c(5,6,7,8)

name<-c("E","F","G","H")

student2<-data.frame(ID,name)

total_student3<-rbind(student1,student2)

total_student3