[R] multiple graphics windows open with sessionInfo

[Erin Hodgess]

Dear R People:

Hello again.  I'm trying to have 3 graphics windows visible
simultaneously.  I set up a zoo series.
Then I plot the original series.  I use the locator function to select
2 values from the original series, which generates a subset of the
original series.

Next, I plot the subset.

The last step is to produce an EWMA chart from the subset series.

Fair enough.  I've tried all sort of things, but can only have 2
graphics windows open with "stuff" in them.  If I go into the blank
window and maximize it, then it appears.  But other than that, it does
not.


> xdate <- seq(as.Date("1998-01-01"),as.Date("2010-06-30"),by="day")
> length(xdate)
[1] 4564
> xt <- zoo(rnorm(4564),order=xdate)
> #Here is the function itself:
> eplot
function (x)
{
    require(zoo)
    require(qcc)
    windows()
    plot(x)
    z <- locator(2,type="l",col="red")
    windows()
    plot(window(x, start = min(z$x), end = max(z$x)))
    windows()
    ewma(window(x, start = min(z$x), end = max(z$x)))
    dev.set(3)
 plot(window(x, start = min(z$x), end = max(z$x)))

}
> sessionInfo()
R version 2.11.1 (2010-05-31)
i386-pc-mingw32

locale:
[1] LC_COLLATE=English_United States.1252  LC_CTYPE=English_United
States.1252    LC_MONETARY=English_United States.1252 LC_NUMERIC=C
[5] LC_TIME=English_United States.1252

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base

other attached packages:
[1] qcc_2.0.1   zoo_1.6-3   proto_0.3-8

loaded via a namespace (and not attached):
[1] dynlm_0.2-3       grid_2.11.1       lattice_0.18-8
strucchange_1.4-0 tcltk_2.11.1      tools_2.11.1      traitr_0.7
>


Any help would be much appreciated.

Thanks,
Erin


-- 
Erin Hodgess
Associate Professor
Department of Computer and Mathematical Sciences
University of Houston - Downtown
mailto: erinm.hodgess at gmail.com