I'm trying to build a data.frame row-by-row like so:
df <- data.frame(rbind(list('a',1), list('b', 2), list('c', 3)))
I was surprised to see that the columns of the resulting data.frame
are stored in lists rather than vectors.
str(df)
'data.frame': 3 obs. of 2 variables:
$ X1:List of 3
..$ : chr "a"
..$ : chr "b"
..$ : chr "c"
$ X2:List of 3
..$ : num 1
..$ : num 2
..$ : num 3
The desired result is:
str(df)
'data.frame': 3 obs. of 2 variables:
$ X1: chr "a" "b" "c"
$ X2: num 1 2 3
The following works, but is rather ugly:
df <- data.frame(lapply(data.frame(rbind(list('a',1), list('b', 2),
list('c', 3))), unlist))
Thanks,
Shaun
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