Hello,

Try the following example.



#install.packages("reshape2")

library(reshape2)

d <- data.frame(D=Sys.Date()+1:5, Temp1=1:5, Temp2=6:10, Temp3=11:15)
d
dm <- melt(d, id=("D"))
dm


If this seems familiar, then in your it should be id=c("Length", "Date") if "Date" already is a data.frame column.

Hope this helps,

Rui Barradas

Em 10-06-2012 10:21, mpavlic escreveu:

Thanks for reply Rui,

this is not exactly what i need. The way you proposed i get the data
structured like this :

        Length, TempAtLocation1, TempAtLocation2....TempAtLocationN

What i'd like is to actuall get the data from each file in Columns, but they
should be binded in rows in one table...something like this :


                        Length, Date(or the name of each file), Temperature
                        .
                        .       
        file 1  .
                        .
                        .
                        .
                        .       
        file 2  .
                        .
                        .
                        .
                        .       
        file 3  .
                        .
                        .
                        .
                        .       
        file N  .
                        .
                        .
                        
In that way i would have only three columns, and each 970 inputs (rows) the
values woud represent temperature at different date (meaning imported column
from a new file).

Any ideas?

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