try:
as.numeric(T3)
Note that this is a typical "r-help" question.
Thomas Petzoldt
------------------------------------------
DataSetb <- data.frame(
T1 = rep("2012-06-01 1:00", 5),
T2 = rep("2012-06-02 0:00", 5)
)
T1<- as.POSIXlt(DataSetb$T1)
T2<- as.POSIXlt(DataSetb$T2)
T3<- as.numeric(difftime(T2, T1))
T3
DataSetb.2<- cbind(DataSetb,T3)
write.table(DataSetb.2, file="DataSetb.2.csv", col.names=NA, sep=",")
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