Hello,
I made a mistake and passed stringsAsFactors to the wrong function in :
> df <- as.data.frame( list( x = 1:3, y = c("a", "b", "c" ),
stringsAsFactors = FALSE ) )
But then :
> df
x y
1 1 a
2 2 b
3 3 c
and :
> df[["y"]]
[1] a b c
Levels: a b c
> str( df )
'data.frame': 3 obs. of 3 variables:
$ x : int 1 2 3
$ y : Factor w/ 3 levels "a","b","c": 1 2 3
$ stringsAsFactors: logi FALSE FALSE FALSE
Somehow, print.data.frame does not want to print a column named
"stringsAsFactors". (I know this is a bad name for a column, but ...)
Apparently, this line in format.data.frame is responsible for the mismatch:
x <- do.call("data.frame", rval)
Romain
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Romain Francois
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http://romainfrancois.blog.free.fr
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