Re: [R] Extracting dates to create a new variable

Try this. dfsub <- df[df$deps %in% c("CC", "DD", "FF"), ] names(dfsub) <- c("Subject", "newdate", "origdep") final <- merge(df, dfsub) Jean On Wed, Aug 10, 2016 at 10:58 AM, Farnoosh Sheikhi via R-help < r-help@r-project.org> wrote: > blockquote, div.yahoo_quoted { margin-left: 0 !important; b

Re: [R] Extracting dates to create a new variable

Getting the dates of the departments CC, DD, FF can be done with subset(df, deps %in% c("CC", "DD", "FF")) I am not sure how you intend to match these identified dates with other departments? From your example you sometimes replace earlier dates, sometimes later dates. HTH Ulrik On Mon, 8 Aug 2