[New to the community; still in early part of R's learning curve.] Several months ago, I was requested to generate some graphs on a periodic basis. Accordingly, I managed to figure out a way to do so, using a combination of Perl and R (in a FreeBSD environment).
While I've needed to adjust a few things here and there, the general
approach has been pretty solid , and the R part has had very little
change perceived as necessary.
I re-generate the graphs each Wednesday morning (as they show disk space
utilization over time).
This morning, one of the graphs -- the first that used plot() with
"par(new = TRUE)" reported an error. Re-doing the work interactively,
I was able to re-create the problem. Poking around with
debug(plot.window) showed that while the ylim values make sense,
the xlim values are ... of an unexpected type altogether.
And when I re-tried the plot() invocation, but without the "par()"
argument, the xlim passed to plot.window() was fine, and the plot was
OK.
The data look like:
Tag Cap mean_GB median_GB census
1 2010-02-03 540972711754 213.5250 154.1011 1061
2 2010-02-10 531711798208 169.4235 124.3809 1033
3 2010-02-17 544482444926 171.2384 130.0641 1052
...
52 2011-01-26 558625618800 195.2759 175.1277 1386
53 2011-02-02 571187807274 199.4980 170.4478 1406
54 2011-02-09 562448031310 197.5468 166.8976 1367
I'm trying to generate a plot, then overlay 3 more plots on it -- which
has been working for several months:
> plot(Is_total$Tag, Is_total$Cap/1024/1024/1024, type = "l", col = "blue",
> ylim = c(0, max(Is_total$Cap/1024/1024, Is_total$census * 400)/1024), xlab =
> "Date", ylab = "Capacity(TB)", main = "Total Local Disk Space")
> debug(plot.window)
> plot(Is_total$Tag, (Is_total$census * Is_total$mean)/1024, type = "l", col =
> "green", ylim = c(0, max(Is_total$Cap/1024/1024, Is_total$census *
> 400)/1024), ann = FALSE, axes = FALSE, par(new = TRUE))
debugging in: plot.window(...)
debug: .Internal(plot.window(xlim, ylim, log, asp, ...))
Browse[2]> ylim
[1] 0.0000 549.2188
Browse[2]> xlim
$new
[1] FALSE
Browse[2]> c
Error in plot.window(...) : invalid 'xlim' value
> sessionInfo()
R version 2.12.1 (2010-12-16)
Platform: i386-portbld-freebsd8.2 (32-bit)
locale:
[1] C
attached base packages:
[1] stats graphics grDevices utils datasets methods base
> plot(Is_total$Tag, (Is_total$census * Is_total$mean)/1024, type = "l", col =
> "green", ylim = c(0, max(Is_total$Cap/1024/1024, Is_total$census *
> 400)/1024), ann = FALSE, axes = FALSE)
debugging in: plot.window(...)
debug: .Internal(plot.window(xlim, ylim, log, asp, ...))
Browse[2]> ylim
[1] 0.0000 549.2188
Browse[2]> xlim
[1] 14643 15014
Browse[2]> c
exiting from: plot.window(...)
> q()
This is running on my laptop:
FreeBSD 8.2-PRERELEASE #99 r218478: Wed Feb 9 04:17:55 PST 2011
r...@g1-222.catwhisker.org.:/common/S1/obj/usr/src/sys/CANARY
(Yes, I track FreeBSD stable/8 on it daily.)
I built R as a FreeBSD port; it is version 2.12.1. (I update the
installed ports daily, too.)
I actually first noticed the behavior on my desktop machine at work; it
is also running FreeBSD stable/8, but only updated as of 30 Jan 2011 --
and the problem did not exist last week. So I don't believe this is
because of a change in FreeBSD.
For now, I'm (also) open to circumventions, so I can avoid complaints
about the graphs that weren't updated at work, but I'd like to resolve
the issue. (And yes, I fully understand that what needs to be fixed is
my understanding of how to use the tools.)
Thanks!
Peace,
david
--
David H. Wolfskill r...@catwhisker.org
Depriving a girl or boy of an opportunity for education is evil.
See http://www.catwhisker.org/~david/publickey.gpg for my public key.
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