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fourdoubles
2006 Nov 03
1
man page for as.matrix for data frames outdated?
...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] "double"
> fourComplexes <- (-1:2)+3i
> df4 <- data.frame(a=fourLogicals, d=fourComplexes, b=fourInts,
c=fourDoubles)
>...