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Package "bigmemory" is now available on CRAN. A brief abstract follows: Multi-gigabyte data sets challenge and frustrate R users even on well-equipped hardware. C/C++ and Fortran programming can be helpful, but is cumbersome for interactive data analysis...

Terry Therneau-2 wrote > Another solution is the one used for a long time in the rpart code. > The R code called "rpart1", which does the work, keeps a static pointer to > the object, > does NOT > release it's memory...

I can't speak for ff and filehash, but bigmemory's data structure doesn't allow "clever" merges (for actually good reasons). However, it is still probably less painful (and faster) than other options, though we don't implement it...

This is not necessarily an R method, but may be useful to some. In Excel, one can quickly replace blank cells with a particular value (e.g., 0, NA) by the following method: 1) Select the data region 2) ctrl...

Dear Reuben, [snip] > my questions now are... how would I generalize functions 3 and 4 for m > And, which of the 4 functions would be best for varying ranges of > n and m? I am expecting values for n to...

I'm not sure I'd go quite this far in ragging on the C API. For someone who wants to write plain-vanilla C code (without C++) working on vectors and matrices, it really seems acceptable to me. If...

Dear R-help, Suppose I write a script that looks something like this: #### script.R set.seed(something) x <- rnorm(100) y <- runif(500) # bunch of other stuff save.image() ### end of script.R Now, I give you a copy...

Simon, Though we're please to see another use of bigmemory, it really isn't clear that it is gaining you anything in your example; anything like as.big.matrix(matrix(...)) still consumes full RAM for both the inner matrix...

Is there some possibility 4.2 might be included in addition to 4.0, but that 4.0 could be the default behavior? This might be consistent with the following email from my student (though it's also possible that...

Dear Brandon, On Tue, Dec 2, 2008 at 10:46 PM, Dylan Beaudette <dylan.beaudette at gmail.com> wrote: > On Tue, Dec 2, 2008 at 7:42 PM, philozine <philozine at yahoo.com> wrote: >> Dear all: >> >> This is one of...

Jim, .combine=rbind may be helpful in some cases. However, in a case like this it wouldn't surprise me if the returns are more complex (like a list of matrices). Although I haven't done it, you can write...

Hi I?aki and Evan, Thank you for checking this. My version of CentOS was installed by the Federal Government, and there is disk encryption. I am able to regularly update CentOS. Anyway, the problem seems to be on my...

I'm trying to see if there is more significance in a cluster of zip codes vs single zip codes based on a mileage rate (linehaul charge). Looking to figure out directionality in pricing/rate structures. As of right now...

Johannes, > In the Debian README, it currently says: > > You only need r-base-dev if you want to compile R packages yourself or other > software depending on R (see section below on administration and maintenance). > > So I am thinking to...

Dear R-help, This thread was started by a graduate student that I am supervising who is supposed to know how to do this already. I would appreciate it if the readers of this list would please refrain from any...

Dear Josh, On Mon, Oct 11, 2010 at 3:15 PM, Joshua Wiley <jwiley.psych at gmail.com> wrote: > Hi All, > > Does anyone know of a function to plot a regression surface for two > predictors? ?RSiteSearch()s and findFn()s...

That must be it. Our new 3.0.0 has then added the Suggests, and as the changes from 2.2.0 to 3.0.0 were unrelated I assumed we had been properly suggesting previously; apparently not. Thanks, Jay...

Dear Andrea, On Tue, Dec 15, 2009 at 11:19 AM, Andrea Fui <warlock84 at gmail.com> wrote: > HI, i'm really new of R and i need some help. > > I have to describe some distributions for some dices throw...

Dear R-SIG-teaching, I have opened up guest access to the Moodle course for STAT 3743: Probability and Statistics. The URL is http://www.moodle.ysumathstat.org/ There a person will (cumulatively) find lecture notes, selected quizzes, exams, and...

I downloaded the rseptbeta.zip and exe.zip files for Windows (I'm running Win 95 4.00.950a) about three weeks ago and until now had been very impressed. Today the executable rsept.exe (dated 10/29/97) went...