by.df: by.df
In livioivil/rospo: Utilities from associazionerospo.org

Same as df, but Value is a data.frame, not a list.

1 2	## S3 method for class 'df' by(...)

Come df, ma value e' un data.frame e non una list

##---- Should be DIRECTLY executable !! ----
##-- ==>  Define data, use random,
##--	or do  help(data=index)  for the standard data sets.

## The function is currently defined as
function (...) 
{
    rr = by(...)
    attr(rr, "class") = "list"
    rr = data.frame(rr)
    rr = t(rr)
    if (!is.null(list(...)$INDICES)) {
        rownames(rr) = unique(list(...)$INDICES)
    }
    else rownames(rr) = unique(list(...)[[2]])
    rr
  }