Jgabriel wrote:
I can't fully answer all these questions, but I'll do my best - There
have not been any updates of Windows, and I did not update R during
the period, although I did reinstall it after the problem started.
There have been no changes to Norton or any other software that uses
system resources in that way. The one thing I can think of is that I
installed a program called Digitizer (creates data tables/ csds from
visually analyzing line charts) around the same time it started
freezing. I have completely uninstalled it and deleted all related
files. The problem should not be with the data, which is fine. I am
running Windows XP Professional and Excel 2007. I have allowed the
process to run overnight on two separate occasions. The first time it
was completely frozen and there was no progress. Last night it
actually made progress, but the fact remains that a process that used
to take an hour at the most still has not even halfway completed after
over 8 hours. I even installed extra RAM on the system
Aha! Please ask your local IT experts to check the RAM and if that is
fine ask them to proceed. I have already seen too many machines with RAM
problems during the last years. It is hardly an R problem.
Uwe Ligges
so that there
is more than when the process used to work. I agree that it is
probably a change in software, but I can't figure out what has changed
or what I can do about it.
Thanks for your help,
JGS
On Nov 12, 7:05 pm, J Dougherty <j...@surewest.net> wrote:
There are some points of information you should include. One, have there been
recent updates of Windows that may have altered system behaviour? Two, have
you updated R during the same period? Three, have you installed software that
uses system resources that were available to R before - e.g. has Norton or
whatever you use to guard your system upgraded? Four, what versions of
Windows and Excel are you running? Five, have you inspected your data for
corruption? Six, what changes (data entry, editing, recoding, etc.) have you
done that might coincide with the changed behaviour? Seven, have you allowed
the process to simply run - say overnight? Nine, how big is you database?
In essence, your problem sounds like system problem. The most likely cause is
a change in software, but without some really clear information on changes on
your system that could potentially have caused this, you are unlikely to find
it easily. One possibility is that a change in software has resulted in
smaller available resource space.
JWDougherty
On Thursday 12 November 2009 09:05:34 am Jgabriel wrote:
I have a question that might not be "kosher" here, but I'm running out
of options and need some help. Basically using the function "step" is
freezingR. I am running a model that includes a number of
interactions on a large data set with a number of dummy variables
representing whether an event occurred or not. Here's a simplified
example -
fit = lm(a~b*(c+d+e)*(f+g+h)*(i+j+k))
regs = step(fit)
at this point R freezes and alternates between "Not Responding" and
"Running" in Windows task manager. It wasn't always this way. I was
able to run the same model on the same dataset a couple weeks ago and
while it took the step function 20-30 minutes to compute the best AIC
and didn't exclude all the insignificant variables/interactions, it
served its purpose. Even after uninstalling and reinstalling R and
RExcel (which I used to load the data set), the problem persists. I
tried it on a smaller data set and still no luck. This is more of a
computing issue, so if anyone can point me to a forum better equipped
to help me out, I will owe you my eternal gratitude. I hate to fill up
space with such an uninspired question, but like I said I'm running
out of options.
Thanks,
JGS
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