Same function over multiple data frames in R

Question

I am new to R, and this is a very simple question. I\'ve found a lot of similar things to what I want but not exactly it. Basically I have multiple data frames and I simply

Answer 1

In case you want all the outputs in the same file this may help.

 df1 <- data.frame(x = rep(3, 5), y = seq(1, 5, 1), ID = letters[1:5])
 df2 <- data.frame(x = rep(5, 5), y = seq(2, 6, 1), ID = letters[6:10])

 z=list(df1,df2)
 df=NULL
 for (i in z) {
 i$Avg=(i$x+i$y)/2
 df<-rbind(df,i)
 print (df)
 }

 > df
   x y ID Avg
1  3 1  a 2.0
2  3 2  b 2.5
3  3 3  c 3.0
4  3 4  d 3.5
5  3 5  e 4.0
6  5 2  f 3.5
7  5 3  g 4.0
8  5 4  h 4.5
9  5 5  i 5.0
10 5 6  j 5.5