similar to: solving a system of nonlinear equations

Hi Is there a way to programmatically tell whether R is running in batch or GUI mode? Thanks Dave _______________________________________________ David Khabie-Zeitoune Quantitative Arbitrage Brevan Howard Asset Management direct: +44 (0)20 7022 6167 mobile: +44 (0)7799 411 797 email: david.khabie-zeitoune@brevanhoward.com Almack House 28 King Street

Hi everyone, I am sure that this question has been asked here some time ago but I do not remember the answer and was unable to find it in the archives... Below is my question: suppose that I have a data.frame x and one of it's columns name is "CPI/RPI" (without quotation marks of course). How can I reference this column? Neither of x$CPI/RPI or x$"CPI/RPI" work. I

Is there a convenient way to respond to a particular posting which is a part of the digest? I mean something that will automatically quote the original message, subject, etc. Thank you! Moshe Olshansky m_olshansky at yahoo.com

Hello! I have no problem reading Excel files (each worksheet in the file is a "table" which can be read - at least in my case). What I would like to do is to read such a table, change it (just the contents, not the format) and write it back, and this I can not do. I am getting the following error messages (3 slightly different attempts): > sqlSave(con, x, tablename =

Hello! I have a short question: Is it possible to create a (non-existing) Access database using R (and if yes, how)? I need to create a new database and then insert a few tables into it. Thank you in advance, Moshe Olshansky m_olshansky at yahoo.com

Hi Stefan, Thank you very much for pointing me to the wordspace package. It does the job a bit faster than my C code but is 100 times more convenient. By the way, since the tcrossprod function in the Matrix package is so fast, the Euclidean distance can be computed very fast: euc_dist <- function(m) {mtm <- Matrix::tcrossprod(m); sq <- rowSums(m*m);? sqrt(outer(sq,sq,"+") -

The arr.ind in the which function does the job very nicely!!! Thank you everyone for the suggestions! Ana > > >---- Mensaje Original ---- >De: marc_schwartz at comcast.net >Para: m_olshansky at yahoo.com >Asunto: Re: [BioC] [R] function to find coodinates in an array >Fecha: Thu, 16 Aug 2007 21:53:44 -0500 > >>If I am correctly understanding the problem, I think

Hello, I'm glad that it worked. Two things: 1. Please, click reply all to keep this threaded. 2. The question should have belonged to r-help at r-project.org, not to r-devel at r-project.org. Rui Barradas ?s 07:10 de 17/03/20, Moshe Olshansky escreveu: > It works, thank you! > > On Tuesday, 17 March 2020, 5:47:05 pm AEDT, Rui Barradas > <ruipbarradas at sapo.pt> wrote:

Hello, Below is my code: > A <- matrix(rnorm(10*3),ncol=3) > b <- runif(10) > reg <- lm(b ~ A) > A1 <- matrix(rnorm(5*3),ncol=3) > A1 <- as.data.frame(A1) > b1 <- predict(reg,A1) Warning message: 'newdata' had 5 rows but variables found have 10 rows ? And instead of being an array of length 5, b1 is of length 10 and is identical to reg$fitted.values I

Please forgive me if my question is answered in Help FAQ no. 23481739... In language like C every variable must be declared before it can be used. In VBA, if a variable has not been declared it is assumed to be of a special type (Variant). In R (and Matlab) variables do not have to be declared. This is convenient, but in a large program one can make a typo which will be extremely difficult to

The issue seems related to R bug report 15012: https://bugs.r-project.org/bugzilla3/show_bug.cgi?id=15012 As mentioned in the comments there, a pull request to the TRE library has recently been made, but I don't know about its status. Daniel ________________________________________ Von: R-devel <r-devel-bounces at r-project.org> im Auftrag von Tomas Kalibera <tomas.kalibera at

Hi, Round(0.55,1)=0.5 Round(2.55,1)=2.6 Can this be right? Thanks, Ed [[alternative HTML version deleted]]

Dear R Users, I have a network of 25000 total nodes and a list of 500 node which is a subset of all nodes. Now I want to calculate the APSP (all pair shortest path) matrix only for these 500 nodes. I would appreciate any help. Thanks in advance Dinesh -- Dinesh Kumar Barupal Research Associate Metabolomics Fiehn Lab UCD Genome Center 451 East Health Science Drive GBSF Builidng University of

Hello all! Maybe it's a newbie question(in fact I _am_, a newbie), but I hope you'll find the solution. I have an equation system which has k equation and n variables (k<n). I would like to obtain a description of the solutions (which can be the equation of lines or a plane, or everything else) with the lesser degree of freedom, obviously using R. In other words, I would like to

????? I concur with Moshe.? David and his team have done great thing for R, but a lion will not become a vegetarian.? I think that any reasonable reading of Microsoft's history will supports that perspective.? However, this is a fairly well documented phenomenon far beyond Microsoft.? Jean Tirole won the 2014 Nobel Memorial Prize in Economics for establishing that, especially regarding

If my sample size is small is there a particular switch option that I need to use with t.test so that it calculates the t ratio correctly? Here is a dummy example? á =0.05 Mean pain reduction for A =27; B =31 and SD are SDA=9 SDB=12 drgA.p<-rnorm(5,27,9); drgB.p<-rnorm(5,31,12) t.test(drgA.p,drgB.p) # what do I need to give as additional parameter here? I can do it manually but

Based on simulations, I've come up with a simple function to compute the confidence interval for the variance of the binomial variance, where the true variance is v = rho*(1-rho)/n where rho = true probability of success and n = # of trials. For x = # successes observed in n trials, p = x / n as usual. For p < 0.25 or p > 0.75, I use the proportion-based transformed confidence

The problem is in TRE library, in regcomp, while compiling the regular expression. This is enough to trigger in R (to do this without re-boot: ulimit -v 500000 ): > strsplit("", "\\\\)") To repeat in TRE, one can build TRE from sources and run > ./src/agrep "\\\\)" README.md Tomas On 08/17/2017 09:45 AM, Moshe Olshansky via R-devel wrote: > I tried

Dear R developers, I am visualising high dimensional genomic data and for this purpose I need to compute pairwise distances between many points in a high-dimensional space (say I have a matrix of 5,000 rows and 20,000 columns, so the result is a 5,000x5,000 matrix or it's upper diagonal).Computing such thing in R takes many hours (I am doing this on a Linux server with more than 100 GB of RAM,

Hi R, I need to generate 50 random numbers (preferably poisson), such that their sum is equal to 100. How do I do this? Thank you, Shubha This e-mail may contain confidential and/or privileged i...{{dropped:13}}