[R] table problems

David Brahm brahm at alum.mit.edu
Thu Jun 13 15:49:31 CEST 2002

Robin Hankin <r.hankin at auckland.ac.nz> has a vector of trees visited:
  R> c <- c(3,14,17,22,26,26,17,40,43,25,46,46)
and wants a count of visits for trees 1:50.  table(c) is inadequate because it
omits the zero cases.

Brian D. Ripley <ripley at stats.ox.ac.uk> suggested:
> Try tabulate(c), which goes to 46.  Or, better,
> tab <- rep(0,50)
> names(tab) <- 1:50
> tab[names(table(c))] <- table(c)

But tabulate has a second argument (nbins) which does what you want in 1 line:
  R> tabulate(c, 50)
                              -- David Brahm (brahm at alum.mit.edu)
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