I'm a little confused by a change in behavior from 2.2.1 to 2.3.0. In 2.2.1 I
could do
> ## Create a list of data frames in 2.2.1
> b <- list(x = data.frame(a = 1, b = 2), y = data.frame(a = 1, b = 2))
> do.call("rbind", b)
a b
x 1 2
y 1 2
But in 2.3.0 I get
> do.call("rbind", b)
Error in data.frame(a = c("1", "1"), b = c("2", "2"), check.names = FALSE, :
row names contain missing values
Traceback indicates that the error is actually in the print method.
> d <- do.call("rbind", b)
> d
Error in data.frame(a = c("1", "1"), b = c("2", "2"), check.names = FALSE, :
row names contain missing values
But:
> d[1:2, ]
a b
NA 1 2
NA1 1 2
>
I'm not sure those are the intended row names but I'm not sure. The following
does seem to work as I would have expected:
> b <- list(x = data.frame(a = 1:2, b = 2:3), y = data.frame(a = 1:2, b =
> 2:3))
> do.call("rbind", b)
a b
x.1 1 2
x.2 2 3
y.1 1 2
y.2 2 3
>
-roger
--
Roger D. Peng | http://www.biostat.jhsph.edu/~rpeng/
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