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Dear colleague, Just an e-mail to know if they are people working in the field of chemoinformatic that are using R in their work. If yes I was wondering if we couldn't exchange tips and tricks about the use of R in this area ? Best regards Fred Ooms [[alternative HTML version deleted]]

Hi, yes a bold statement, but I get different behaviour from 2.6.2 and 2.7.0 in read.table, and I don't find any documentation in http://cran.r-project.org/src/base/NEWS. A file like (space delimited): foo + . bar - . 2.7.0: > tab <- read.table("test.txt",as.is=TRUE) > tab V1 V2 V3 1 foom 0 0 2 bar 0 0 while until now and on 2.6.2 > tab <-

On Jan 4, 2010, at 4:35 AM, Chandler Carruth wrote: > Responding to the original email... > > On Sun, Jan 3, 2010 at 10:10 PM, James Y Knight <foom at fuhm.net> wrote: >> In working on an LLVM backend for SBCL (a lisp compiler), there are >> certain sequences of code that must be atomic with regards to async >> signals. > > Can you define exactly what

Responding to the original email... On Sun, Jan 3, 2010 at 10:10 PM, James Y Knight <foom at fuhm.net> wrote: > In working on an LLVM backend for SBCL (a lisp compiler), there are > certain sequences of code that must be atomic with regards to async > signals. Can you define exactly what 'atomic with regards to async signals' this entails? Your descriptions led me to think

On Mon, Jan 4, 2010 at 1:13 PM, James Y Knight <foom at fuhm.net> wrote: > Hi, thanks everyone for all the comments. I think maybe I wasn't clear that > I *only* care about atomicity w.r.t. a signal handler interruption in the > same thread, *not* across threads. Therefore, many of the problems of > cross-CPU atomicity are not relevant. The signal handler gets invoked via

On Mon, Jan 4, 2010 at 8:43 PM, Chandler Carruth <chandlerc at google.com> wrote: > On Mon, Jan 4, 2010 at 1:13 PM, James Y Knight <foom at fuhm.net> wrote: >> Hi, thanks everyone for all the comments. I think maybe I wasn't clear that >> I *only* care about atomicity w.r.t. a signal handler interruption in the >> same thread, *not* across threads. Therefore,

Hello, I am looking for any packages, tutorials, documents,... about the use of R for the analysis of HTS data. Thanks for your help Fred [[alternative HTML version deleted]]

On Mon, Jan 4, 2010 at 8:51 PM, Jeffrey Yasskin <jyasskin at google.com> wrote: > On Mon, Jan 4, 2010 at 8:43 PM, Chandler Carruth <chandlerc at google.com> wrote: >> On Mon, Jan 4, 2010 at 1:13 PM, James Y Knight <foom at fuhm.net> wrote: >>> Hi, thanks everyone for all the comments. I think maybe I wasn't clear that >>> I *only* care about

On Jan 5, 2010, at 1:09 AM, Chandler Carruth wrote: >>>>> Consider that 'memset' to zero is often codegened to a non- >>>>> temporal >>>>> store to memory. This exempts it from all ordering considerations Hm...off topic from my original email since I think this is only relevant for multithreaded code... But from what I can tell, an

In working on an LLVM backend for SBCL (a lisp compiler), there are certain sequences of code that must be atomic with regards to async signals. So, for example, on x86, a single SUB on a memory location should be used, not a load/sub/store sequence. LLVM's IR doesn't currently have any way to express this kind of constraint (...and really, that's essentially impossible since

The LLVMAddFunctionAttr and LLVMRemoveFunctionAttr are busted: they actually set the return value's attributes, not the function's attributes. There seems to be no C API for actually setting the function attributes. LLVMGetFunctionAttr, however, does correctly return the function attributes, not the return value's attributes. There is no C API for getting the return value

Hello, How could I scale and center the data contained in the attached file since I would like to do this before doing a PCA analysis on them as well as drawing boxplot. <<DB_molprop.txt>> -------------- next part -------------- An embedded and charset-unspecified text was scrubbed... Name: DB_molprop.txt Url:

Hello, Could you tell me if a package exists to perform a binary kernel discrimination using a training set compose of molecules represented by binary fingerprint. This method was first described by Harper in J. Chem. Inf. Comput. Sci 2001 41 1295 and is also described in recent papers published in the same journal by Hert Jerome. I have attached the page describing the BKD method used in the

Dear colleagues, I a m a beginner with R and I would like to add labels (i.e. the variable names) on a pca loading plot to determine the most relevant variables. Could you please tell me the way to do this kind of stuff. The command I use to draw the pca loading plot is the following : Plot(molprop.pc$loading[,1] ~ molprop.pc$loading[,2]) Thanks for your help Fred Ooms

Hi, Another newbie question. Once I have generated a PCA model using the princomp command how can i use it to display a new dataset ? Thanks for your help Fred [[alternative HTML version deleted]]