Displaying 6 results from an estimated 6 matches for "sgilpin".
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gilpin
2005 Jun 10
1
Performance difference between 32-bit build and 64-bit build on Solaris 8
...'m seeing a 32-bit build perform significantly faster (up to 3x) than
a 64 bit build on Solaris 8. I'm running R version 2.1.0. Here are
some of my system details, and some resulting timings:
>uname -a
SunOS lonetree 5.8 Generic_117350-16 sun4u sparc SUNW,Sun-Fire-V440
lonetree /home/sgilpin >gcc -v
Reading specs from /usr/local/lib/gcc/sparc-sun-solaris2.8/3.4.2/specs
Configured with: ../configure --with-as=/usr/ccs/bin/as
--with-ld=/usr/ccs/bin/ld --disable-nls
Thread model: posix
gcc version 3.4.2
I built the 32 bit version of R with no changes to config.site. I
built the 64 bi...
2005 Jun 11
2
Performance difference between 32-bit build and 64-bit bu ild on Solaris 8
...m significantly faster (up to 3x) than
> a 64 bit build on Solaris 8. I'm running R version 2.1.0. Here are
> some of my system details, and some resulting timings:
>
> >uname -a
> SunOS lonetree 5.8 Generic_117350-16 sun4u sparc SUNW,Sun-Fire-V440
>
> lonetree /home/sgilpin >gcc -v
> Reading specs from /usr/local/lib/gcc/sparc-sun-solaris2.8/3.4.2/specs
> Configured with: ../configure --with-as=/usr/ccs/bin/as
> --with-ld=/usr/ccs/bin/ld --disable-nls
> Thread model: posix
> gcc version 3.4.2
>
> I built the 32 bit version of R with no changes...
2004 Aug 27
3
Reading SAS data into R
Dear all,
One of my students (whom I am trying to convince to use R) wants to get a fairly large SAS dataset into R (about 150mB). An obvious and simple thing she tried was to write the dataset as a .csv-file and then read that into R, but that takes forever (or something close to that..). The dataset is so large, that exporting it as an Excel file from SAS is not feasible (more than 65000 lines).
2004 Oct 14
0
random forest problem when calculating variable importance
Hi -
When using the randomForest function for regression, I get different
results for mean-squared error of the predictions depending on whether
or not I specify to calculate variable importance. There is an
example below. I looked briefly at the source code, but couldn't find
anything that would indicate why calculating variable importance would
(or should) change predictions.
I'm
2004 Oct 11
0
scoping problem when calling step inside a function
Hi everyone -
I'm trying to do a forward stepwise regression (I've tried both step
and stepAIC) inside of a function. I can do it outside the function
with no problems (first example in code below). I can also do a
backward stepwise regression inside a function (second example), but
forward stepwise regression ( third example ) fails with the error:
"Error in
2004 Aug 18
1
Memory Problems in R
Hello everyone -
I have a couple of questions about memory management of large objects.
Thanks in advance for your response.
I'm running R version 1.9.1 on solaris 8, compiled as a 32 bit app.
My system has 12.0 GB of memory, with usually ~ 11GB free. I checked
system limits using ulimit, and there is nothing set that would limit
the maximum amount of memory for a process (with the