similar to: passing a matrix to C++ with .C()?

Scott Romans wrote: > If we have a function that returns 2 or more values (such as dim as > applied to a matrix), can we assign these 2 or more values to an equal > number of differently named variables in one line? For example, is > there any way to do something like this: > > [NumberRows NumberColumns] <- dim(MatrixA) In that case R returns an object (a vector) with

My computer is a pentium 4 running at 2.4 GHz. My R is 1.7.1 I have written a program in R that calls C++. The program spends most of the time in C++ ( > 90% ). R basically deals with output and input. How slower can this be compared with the program I would get from rewriting everything in C++? Thank you.

Is it possible to compute the variance of every column in a matrix without a loop? -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch

Is there a function like "is.there" such that is.there ( a ) returns TRUE is object 'a' is in the current environment and FALSE otherwise? Thank you. Francisco J. Molina

I am using 1.7.1 in a PC ( redhat 9, linux ) I created a subroutine in C++, mySubrutine, to be used in R. To debug this subroutine I have a main routine in C++ that calls mySubrutine. The only thing main () does is to provide mySubrutine with its arguments (this is the easiest way for me to debug subroutines written in C++ and intended to be used in R ). I also have a version of the same

Subject: Eliminate repeated components from a vector X-Mailer: VM 7.00 under 21.4 (patch 6) "Common Lisp" XEmacs Lucid Reply-To: fjmolina at lbl.gov FCC: /home/f/.xemacs/mail/sent Does anyone know how I can eliminate repeated elements from a vector?

Dear all, I am trying (without much success) to use the fuction 'silhouette'. Would anyone encountered that before (or would know where I am wrong ?) Please find below the R ouput. Thanks in advance, L. > s <- silhouette(ct, as.dist(metric)) Error in "[<-"(*tmp*, iC, "sil_width", value = s.i) : number of items to replace is not a multiple of replacement

Subject: activity of CPU used by R X-Mailer: VM 7.00 under 21.4 (patch 6) "Common Lisp" XEmacs Lucid Reply-To: fjmolina at lbl.gov FCC: ~/mail/sent My R processes never use more than 50% of my CPU activity. Is there any way I can make them use more of it? -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read

Is there any fast way to check that an object is a member of a list? -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch

I would like my program to load variables x,y,x from a file 'myFile.r' but if this file does not exist, I want my program to create/initialize x,y,z. Does anyone know how to do this? Thank you very much. Francisco J. Molina

Using the Matrix package, how can I create a row-oriented sparse Matrix from scratch populated with some data? By default a column-oriented one is created and I'm aware of the note that the package is optimized for column-oriented ones, but I'm only interested in using it for holding my sparse row-oriented data and doing basic subsetting by rows (even using drop=FALSE). Here is what I

This is a Request For Comment, also BCCed to 390 package maintainers of reverse dependencies of the Matrix package. Most users and package authors working with our 'Matrix' package will be using it for numerical computations, and so will be using "dMatrix" (d : double precision) matrix objects M, and indirectly, e.g., for M >= c will also use "lMatrix" (l:

I have to store a number of vectors of the same length. I know the length but I do not know the number of vectors. How can I store them as they are created (they are created one by one)? -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or

I am calling C++ from R. I want C++ to return a vector whose length is not known when the C++ routine is called. Is it possible to do this without using R objects in the C++ routine? So far I have been using .C, but I do not see how I could use it in this case. -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read

Hi, I have a S3 package with namespace called "myS3Pkg". Inside my package I would like to create a S4 class which extends (adds 2 slots) another S4 class from some other package. The class should be created in "myPkg" environment (and not global environment). Using: setClass("myS4class", representation("otherS4class", mydata = "numeric"),

How can locate in my program an error of that kind (Error: subscript out of bounds)? -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch

>>>>> Henrik Bengtsson <henrik.bengtsson at gmail.com> >>>>> on Tue, 19 Apr 2016 14:04:11 -0700 writes: > Using the Matrix package, how can I create a row-oriented sparse > Matrix from scratch populated with some data? By default a > column-oriented one is created and I'm aware of the note that the > package is optimized for

Subject: Error: cannot allocate vector of size 554 Kb X-Mailer: VM 7.00 under 21.4 (patch 6) "Common Lisp" XEmacs Lucid Reply-To: fjmolina at lbl.gov FCC: ~/mail/sent Does anyone know how I can avoid this error? Error: cannot allocate vector of size 554 Kb I think my computer should have enough memory to allocate such vector.

I am moving my first steps in writing and compiling C code and calling it from R. (I am also new to shared libraries...) My problem is that my C code uses a C function contained in another library (".a", not ".so" - is that the problem?). This is how I compile the file with the functions I want to call from R: cd /export/home/gpetris/ R SHLIB tryit.c cc

R-helpers, When I source("tmp.r") a file from within R, the code executes without error. When I launch with 'R --no-save --no-restore < tmp.r', the code sometimes appears to cause some type of buffer overflow and nothing gets executed. tmp.r contains: myData<-c(1,0, ... long vector of numbers) followed by a new line character and then some code to operate on myData. It