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fourints
2006 Nov 03
1
man page for as.matrix for data frames outdated?
...ata frames will be coerced to a logical
matrix":
> fourLogicals <- 2:5>3
> df1 <- data.frame(a=fourLogicals)
> storage.mode(as.matrix(df1))
[1] "logical"
Otherwise it's not true that 'as.matrix' will return a character matrix:
> fourInts <- 2:-1
> df2 <- data.frame(a=fourLogicals, b=fourInts)
> storage.mode(as.matrix(df2))
[1] "integer"
> fourDoubles <- rep(pi,4)
> df3 <- data.frame(c=fourDoubles, a=fourLogicals, b=fourInts)
> storage.mode(as.matrix(df3))
[1] "...