[R] Newbie: Acf function

[Vincent Goulet]

Le Jeudi 8 Février 2007 09:41, Martin Percossi a écrit :
> Hi, I would like to use acf.plot on a correlogram that is computed
> externally. In other words, I would like to "fake out" the acf object.
> Is this possible?-- any help would be appreciated.

Well, essentially plot.acf() makes a plot with 'type = "h"'. Playing around 
with that so give you the desired output.

Now wait a little bit... There, I already wrote such a function:

tacf <- function(x, ...)
{
    plot(x, type = "h", ylab = "ACF", xlab = "Lag",
         ylim = c(-1, 1), ...)
    abline(h = 0)
}

('x' contains the autocorrelations.)

HTH

-- 
  Vincent Goulet, Associate Professor
  École d'actuariat
  Université Laval, Québec 
  Vincent.Goulet at act.ulaval.ca   http://vgoulet.act.ulaval.ca