Hi: Suppose, I have a dataframe (with N rows) containing the following variables: ID X82 X85 X88
From this, I'd like to create a new dataframe (with 3*N rows), which
will have the following variables: ID X82 X85 X88 Xrep where: each ID is duplicated 3 times; X82 equals its original value for the first row and equals NA for the other two; X85 equals its original value for the second row and equals NA for the other two; X88 equals its original value for the third row and equals NA for the other two; Xrep will equal X82, X85 and X88 in the first, second and third rows, respectively. Is there an efficient way to do this? Thanks for any help, Ravi. -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._