Data Frame alternately row binding in R

Question

I have two Data Frames which have the exact the same columns and the same numer of rows.

I want to create a new Data Frame which contains both data frames but having rows binded alternately. It has to take one row from first Data Frame and one row from the second Data Frame untill the whole new Data Frame is built.

I tried to use rbind() without luck. I need a solution that doesn't include installing new R packages.

Picture for demonstration:

EDIT: My number of rows are dynamic and can be very large. Furthermore, I need a solution that doesn't rely on column names since the strucutre is dynamic as well. I know the two data frames have the same structure each time.

Answer 1

You can use mapply with rbind, i.e.

d2 <- data.frame(a = c(4, 6, 8), b = c(letters[5:7]), stringsAsFactors = FALSE)
d1 <- data.frame(a = c(1, 2, 3), b = c(letters[1:3]), stringsAsFactors = FALSE)

mapply(rbind, d1, d2)
#      a   b  
#[1,] "1" "a"
#[2,] "4" "e"
#[3,] "2" "b"
#[4,] "6" "f"
#[5,] "3" "c"
#[6,] "8" "g"