I wonder how could I convert a matrix A to a dataframe such that
whenever I'm running a linear model such lme, I can use A$x1? I tried
data.frame(A), it didn't work. Should I initialize A not as a matrix?
When I try converting a matrix to a data frame, it works for me:
> x <- matrix(1:6,ncol=2,dimnames=list(LETTERS[1:3],letters[24:25]))
A 1 4
B 2 5
C 3 6
`data.frame': 3 obs. of 2 variables:
$ x: int 1 2 3
$ y: int 4 5 6
You can also use as.data.frame() to convert a matrix to a data.frame
(but note that if colnames are missing form the matrix, as.data.frame()
constructs different colnames than does data.frame().
You say "it didn't work" -- it's difficult to help with such a
non-specific complaint. Can you explain exactly how it didn't work for
you? (e.g., show the exact error message).
-- Tony Plate
Chia, Yen Lin wrote:
> Hi all,
> I wonder how could I convert a matrix A to a dataframe such that
> whenever I'm running a linear model such lme, I can use A$x1? I tried
> data.frame(A), it didn't work. Should I initialize A not as a matrix?
> Yen Lin
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