Creating an R dataframe row-by-row

Question

I would like to construct a dataframe row-by-row in R. I\'ve done some searching, and all I came up with is the suggestion to create an empty list, keep a list index scalar,

Answer 1

This is a silly example of how to use do.call(rbind,) on the output of Map() [which is similar to lapply()]

> DF <- do.call(rbind,Map(function(x) data.frame(a=x,b=x+1),x=1:3))
> DF
  x y
1 1 2
2 2 3
3 3 4
> class(DF)
[1] "data.frame"

I use this construct quite often.