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Hi, Given a frame with calendar date's: "2005-07-01", "2005-07-02","2005-07-03","2005-07-04","2005-07-05",etc. I want to extract the following from these dates: week number month number year number Any...
Hi, Given a frame with calendar date's: "2005-07-01", "2005-07-02","2005-07-03","2005-07-04","2005-07-05",etc. I want to extract the following from these dates: week number month number year number Any...
Hi, I have two data frames A en B. I want to filter B with values of A data_frame_b names <- colnames(data_frame_b[1:1, ]) filtera <- data.frame(data_frame_a[1:1]) print(nrow(filtera)) if...
Hi, I have a data fram like this: date column1 column2 column3 value1 value2 value3 1-1 A B C 10 5 2 2-1 A B D 5 2 0 3-1 A B E 17 10 7 How...
Thanks! The as.character fixed it! Regards, Richard On 1/7/06, Prof Brian Ripley <ripley at stats.ox.ac.uk> wrote: > The message is really explicit. > > You are trying to compare the equality of two factors with different level...
this is what I was looking for! many many thanks! regards, richard On 12/12/05, Prof Brian Ripley <ripley at stats.ox.ac.uk> wrote: > On Mon, 12 Dec 2005, ronggui wrote: > > >> x<-as.Date(c("2005-07-01...
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