similar to: eval(parse(text vs. get when accessing a function

Hi All, Sorry if this is a repost (a quick browse didn't give me the answer). I wonder if there are packages that can do the feature selection and classification at the same time. For instance, I am using SVM to classify my samples, but it's easy to get overfitted if using all of the features. Thus, it is necessary to select "good" features to build an optimum hyperplane (?).

Dear All, I've got into the habit of installing R from the precompiled Debian binaries, including many of the packages from the r-cran-* Debian packages, and later building from source (e.g., to link against Goto's BLAS, or to build patched versions, etc). I install the newly built R to the very same place (/usr/lib/R). This allows me to build and update R when I wish, AND provides the

Hi Everyone, I have a question about for loops. If you have something like: f <- function(x) { y <- rep(NA,10); for( i in 1:10 ) { if ( i > 3 ) { if ( is.na(y[i-3]) == FALSE ) { # some calculation F which depends on one or more of the previously generated values in the series y[i] = y[i-1]+x[i]; } else { y[i] <- x[i]; } } } y } e.g. >

Hi Everyone, I have a question about for loops. If you have something like: f <- function(x) { y <- rep(NA,10); for( i in 1:10 ) { if ( i > 3 ) { if ( is.na(y[i-3]) == FALSE ) { # some calculation F which depends on one or more of the previously generated values in the series y[i] = y[i-1]+x[i]; } else { y[i] <- x[i]; } } } y } e.g. >

Hello! I'm calling R from Perl with Statistics-R perl module for a microarray analysis integrated web tool. I have some questions for a multi-users utilisation: - Can I change the directory where R is running in order to have a directory per user? Then no problem of erasing R data of an other user. - If it's not possible, can I limite the number of users at the same time? I see

Is there a colinearty function implemented in R? I have tried help.search("colinearity") and help.search("collinearity") and have searched for "colinearity" and "collinearity" on http://www.rpad.org/Rpad/Rpad-refcard.pdf but with no success. Many thanks in advance, Peter Lauren.

Hi, does anybody know how to use the dual processors in the machines of a cluster? I am using R with rpvm and snow packages. I usually start pvm daemon and add host machines first, and then run R to start my computing work. But I find that only one processor in each machine is used in this way and the other one always stays idle. Is there any simple way to tell pvm to use the two processors at

Dear All, I'd like to be able to have R store (in a list component) a compressed data set, and then write it out uncompressed. gzcon and gzfile work in exactly the opposite direction. What would be a good way to handle this? Details: ---------- We have a package that uses C; part of the C output is a large sparse matrix. This is never manipulated directly by R, but always by the C code.

Hi everyone, I am trying to cross-compile a package I wrote using the Yan and Rossini tutorial "Building Microsoft Windows versions of R and R packages using Intel Linux". I have got reasonably far with this but when doing the linking using the line: i586-mingw32-g++ -shared -s -o mylibrary.dll mylibrary.def mylibrary.o mylibrary_res.o

Dear All, I think I am confused about how I'd be able to use zlib starting with R 2.7.0. I just downloaded the latest development version, built it, etc, but I am not able to find the zlib.h that, I believe, R should place somewhere under "where/you/want/R/to/go" (from --prefix=/where/you/want/R/to/go). There seem to be entry points for zlib in the binary (e.g., grep -r gzopen ./

Greetings! I have a few colleagues who like the idea of Sweave, but have failed to become enlightened monks of the One True Editor (http://www.dina.dk/~abraham/religion/) Are there any other Microsoft-centric editors or IDEs which have solid support for writing SWeave documents (dual R / LaTeX enhancements similar to ESS's support)? Has anyone tried the folding editors which support Noweb?

Dear All, I just apt-get source r-base-core and noticed that file "rules" under ./r-base-3.2.4-revised/debian contains (lines 277 to 279) --with-system-bzlib \ --with-system-pcre \ --with-system-zlib \ I wonder if these are still necessary and, in fact, when building R alpha (specifically, R-alpha_2016-03-21_r70361.tar.gz) I get a warning saying that those options are not

hi. i really need help using this program. computer language is a foreign language to me, and thus, i cannot make heads nor tails of the user manuals from the website. i need to locate step-by-step examples of simple problems such as "graph f(x)+g(x) and f(g(x)) for the domain 0<x<2" and "graph 2H(x), H(x)+1, H(x+1)" i do know how to define the functions, but

Hi all, In Tibshirani's PNAS paper about nearest shrunken centroid analysis of microarrays (PNAS vol 99:6567), they used cross validation to choose the amount of shrinkage used in the model, and then test the performance of the model with the cross-validated shrinkage in separate independent testing set. If I don't have the luxury of having independent testing set, can I just use the

Like kile for LaTeX, Linux/KDE's kate editor is an excellent editor for R, with easy code submission to a running R process. Syntax highlighting is good. I have not been able to figure out two things: - how to automatically reformat a line or region of text using good indentation rules (Emacs/ESS make this so easy by just hitting Tab while the cursor is in a line, or highlighting a

On Wed, 30-12-2015, at 12:44, Dirk Eddelbuettel <edd at debian.org> wrote: > On 30 December 2015 at 05:00, Dario Strbenac wrote: > | Good day, > | > | In section A.2, the manual advises "Linux users will want the urw-fonts package". However, this package only seems to be available for RedHat Linux and Fedora Linux. What about for Debian or Ubuntu ? There is no

Dear all, not really a R question but: If I want to check for the classification accuracy of a LDA with previous PCA for dimensionality reduction by means of the LOOCV method: Is it ok to do the PCA on the WHOLE dataset ONCE and then run the LDA with the CV option set to TRUE (runs LOOCV) -- OR-- do I need - to compute for each 'test-bag' (the n-1 observations) a PCA

Hello everyone, I've been fiddling around with the snow and Rmpi packages on my new Intel Mac, and have run into a few problems. When I make a cluster on my machine, both slaves start up just fine, and everything works as expected. When I try to make a cluster including another networked machine it hangs. I've followed the suggestions at

On 30 December 2023 at 23:49, Ramon Diaz-Uriarte wrote: | All is good. (Just for the sake of curiosity, and if you have the time: why did you find those incantations suspicious?) Memory is fuzzy and no ECC in my wetware :) but as I seem to recall it had to do with my fears over filenames not being standardized enough / this interfering with the update-alternatives mechanism. May well have been

Dear All, How can the height of a leaf be extracted from a dendrogram? Sure, I can print it, but I am not able to, say, store it in an object. I think I understand that the height is a property of the split, not the leaf itself, but the printing functions display a "height" or "h" (which changes with "hang") and that is what I want. Obviously, the info is there