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]))
> data.frame(x)
x y
A 1 4
B 2 5
C 3 6
> str(data.frame(x))
`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().
=========================================
> data <- c(0.1, 0.2, 0.3, 0.3, 0.4, 0.5)
> dimnames <- list(time=c(0, 0.5, 1), name=c("C_0", "C_1"))
> mat <- matrix(data, ncol=2, nrow=3, dimnames=dimnames)
> as.data.frame(as.table(mat))
time name Freq
1 0 C_0 0.1
2 0.5 C_0 0.2
3 1 C_0 0.3
4 0 C_1 0.3
5 0.5 C_1 0.4
6 1 C_1 0.5
=========================================
REF:
https://stackoverflow.com/questions/15885111/create-data-frame-from-a-matrix-in-r
https://stat.ethz.ch/pipermail/r-help/2006-January/085978.html
