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b_i
2008 Aug 13
3
issue building dataframes with matrices.
Hello,
Is this a bug or a feature? I am using R 2.7.1 on Apple OS X.
> y <- matrix(1:3,nrow=3) # y is a single-column matrix
> df <-data.frame(x=1:3,y=y)
> sapply(df,data.class)
x y
"numeric" "numeric"
> df$yy <- y
> sapply(df,data.class)
x y yy
"numeric" "numeric" "matrix"