On 14/01/2010, at 6:00 AM, Nathalie Yauschew-Raguenes wrote:
Hello,
I find a way to convert data in factor type to numeric :
data_numeric <- as.numeric(as.character(data_factor)).
It's treaky but works.
Possibly even more ``treaky'' but more efficient is:
data_numeric <- as.numeric(levels(data_factor)[data_factor])
as has been pointed out quite a few times on this list.
cheers,
Rolf Turner
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