[R] xyplot lines goes forth and backwards

[jim holtman]

You probably want to use something like aggregate or tapply to sum up
the required quantities.  Impossible to give more precise answers
without the actual data and what the expected results might look like.

On Mon, Oct 26, 2009 at 9:36 AM, marcos carvajalino
<maancafe240 at gmail.com> wrote:
> Thanks a lot Jim!! i sorted them and BINGO!!
>
> How about the sum issue? any ideas?
> --
> Marcos Antonio Carvajalino Fernández
> Estudiante de Ingeniería Ambiental y Sanitaria
> Universidad del Magdalena, Colombia
>



-- 
Jim Holtman
Cincinnati, OH
+1 513 646 9390

What is the problem that you are trying to solve?