search for: hongyuan_5_30_forsafe

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2009 May 31
2
convert the contents of a date.frame to a matrix
Dear R user, I am trying to convert the contents of a date.frame to a matrix. Since there are negative values in the date.frame, when I use data.matrix(x, rownames.force = NA), the resulting matrix is not the same as the original one. Basically I think R treats the numbers in the date.frame as character and converts it to corresponding numerics. Any idea on this issue? Many Thanks, Hongyuan