search for: beniltoncarvalho

Hi everyone, For reasons beyond the scope of this message, I'd like to append a NULL element to the end of a list. tmp0 <- list(a=1, b=NULL, c=3) append(tmp0, c(d=4)) ## works as expected append(tmp0, c(d=NULL)) ## list with a/b/c only Given that I could use tmp0$a <- NULL to remove 'a', I seem to understand why appending NULL returns me the original list... But how should I

Hi, what is the proper of of "passing a missing value" so I can extract the entire i-th row of a matrix (in a list of lists) without pre-computing the number of cols? For example, if I know that the matrices have 2 columns, I can do the following: set.seed(1) x0 <- lapply(1:10, function(i) replicate(4, list(matrix(rnorm(10), nc=2)))) lapply(lapply(x0, '[[', 3), '[',

Hi, I have a long list of lists from which I want to efficiently extract and rbind elements. So I'm using the approach below: f <- function(i){ out <- replicate(5, list(matrix(rnorm(80), nc=20))) names(out) <- letters[1:5] out } set.seed(1) lst <- lapply(1:1.5e6, f) (t0 <- system.time(tmp <- do.call(rbind, lapply(lst, '[[', 'b')))) Is there

Hi, I'm working on an S4 class that is expected to behave like an array. I have some difficulties when defining '[' and I wonder if someone could point me to the right direction: 1) Call the S4 object "obj" 2) Assume dim(obj) = c(10, 4, 2) 3) Suppose someone calls: obj[1:3,] , which is a mistake, given dim(obj); how do I detect such situations? Thank you very much for

I need to read in csv files, created by 3rd party, with fields containing single quotes (as shown below). "header1","header2","header3","header4" "field1r1","field2r1","field3r1","field4r1" "field1r2","field2r2","field3r2PartA), field3r2PartB Very" Long","field4r2"

...http://n4.nabble.com/using-a-list-to-index-elements-of-a-list-tp1679184p1679184.html > Sent from the R help mailing list archive at Nabble.com. > > > > ------------------------------ > > Message: 29 > Date: Tue, 23 Mar 2010 15:10:45 +0000 > From: Benilton Carvalho <beniltoncarvalho at gmail.com> > To: Pj253 <pj253 at cam.ac.uk> > Cc: r-help at r-project.org > Subject: Re: [R] using a list to index elements of a list > Message-ID: > ??? <e71a39ea1003230810k445d0d06j87a240986b40af95 at mail.gmail.com> > Content-Type: text/plain; charset=ISO-8859...

Hi everyone, I'm writing on behalf of a friend who's got a Ubuntu 9.04 system. After an apparent successful installation of R (via sudo apt-get install r-base), her attempts of loading R (typing 'R' on the terminal) always return a message stating that it is not installed. Since I'm no expert on Ubuntu nor on its package manag. system and, additionally, I failed on finding

Hi, I have a BioC infra-structure package that works fine (I can build, check and load it successfully) on revision r53950. The very same package fails on r54591 with the error below: Error in loadNamespace(package, c(which.lib.loc, lib.loc), keep.source = keep.source) : cyclic name space dependency detected when loading ?oligoClasses?, already loading ?oligoClasses? I don't see anything

Hi, I'm working on a package and observed a behaviour that was suggested to be incompatible with the documentation. The code below: x <- matrix(1:4, 2) dimnames(x) <- list() works just fine. But checking the documentation for dimnames(), it states that if value is a list "its components are either 'NULL' or a character vector with positive length of the appropriate