search for: marc_grt

It's exactly what I was looking for, thanks. I'm replying to the whole list so others can skip this question, to not waste time on it. Bonne fin de journ?e de Montr?al (nous sommes le matin ici) On Fri, May 3, 2024 at 10:30?AM Marc Girondot <marc_grt at yahoo.fr> wrote: > Is it what you want ? > mat_letters <- matrix(data=c('A', 'B', 'C', 'D'), ncol=2, byrow=TRUE) > mat_bools <- matrix(data=c(FALSE, TRUE, TRUE, FALSE), ncol=2, byrow=TRUE) > > ifelse(mat_bools, mat_letters, "") &...

...regression variables? cheers, Bendix library( splines ) y <- rnorm(100) x <- rnorm(100) k <- -1:1 ml <- lm( y ~ bs(x,knots=k) ) mg <- glm( y ~ bs(x,knots=k) ) all.vars(ml$terms) all.vars(mg$terms) all.vars(mg$formula) ________________________________________ Fra: Marc Girondot <marc_grt at yahoo.fr> Sendt: 8. marts 2018 06:26 Til: Bendix Carstensen; r-help at r-project.org Emne: Re: [R] Names of variables needed in newdata for predict.glm Hi, Some try: > names(mi$xlevels) [1] "f" > all.vars(mi$formula) [1] "D" "x" "f" "Y&qu...

HI, I have the pattern like "`Year_Month)201103`" I want to delete single quotes within double quetes. I want to change it into "Year_Month)201103" , how to do it in r? Thanks a lot. Tammy [[alternative HTML version deleted]]

Dear members, I have a series of values in a vector and some value are missing and replaced with NA. For example: a <- c(27, 25, NA, NA, 24, 26, 27, NA, 26) I would like to replace the NAs with the value taken from the previous value that is non-NA. The output would be in this case: 27 25 25 25 24 26 27 27 26 Now I do that with a for loop, but I try to eliminate all the loops to gain in

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Hi, Some try: > names(mi$xlevels) [1] "f" > all.vars(mi$formula) [1] "D" "x" "f" "Y" > names(mx$xlevels) [1] "f" > all.vars(mx$formula) [1] "D" "x" "f" When offset is indicated out of the formula, it does not work... Marc Le 07/03/2018 ? 06:20, Bendix Carstensen a ?crit?: > I would like

I would like to extract the names, modes [numeric/factor] and levels of variables needed in a data frame supplied as newdata= argument to predict.glm() Here is a small example illustrating my troubles; what I want from (both of) the glm objects is the vector c("x","f","Y") and an indication that f is a factor: library( splines ) dd <- data.frame( D =

Hello, I don't know if the problem originates from R-devel 3.2 or Rcurl itself. I post this message to the R-devel list and to the author of RCurl (duncan at r-project.org). > library("RCurl") Le chargement a n?cessit? le package : bitops > print(sessionInfo()) R Under development (unstable) (2015-02-03 r67717) Platform: x86_64-apple-darwin13.4.0 (64-bit) Running under:

Hi, I have sent this message to this list the July, 7th. It was about a problem in MASS package. Until now there is no change in the devel version. As the problem occurs in a package and not in the R-core, I don't know if the message should have been sent here. Anyway, I have added a copy to Pr Ripley. I hope it could have been fixed. Sincerely Marc Le 09/07/2017 ? 16:05, Marc Girondot via

I just discover the deriv function but I have a minor problem at the end when using its result: For example: dx2x <- deriv(~ A*x^2, "x") ; dx2x # it works fine: # expression({ # .value <- A * x^2 # .grad <- array(0, c(length(.value), 1L), list(NULL, c("x"))) # .grad[, "x"] <- A * (2 * x) # attr(.value, "gradient") <- .grad # .value # }) A

I have a problem with the RNetCDF package in MacOSX 10.8.3, R3.0.0. If you have a solution, it would be great ! Thanks a lot. Marc Girondot > install.packages("RNetCDF") essai de l'URL 'http://cran.at.r-project.org/bin/macosx/contrib/3.0/RNetCDF_1.6.1-2.tgz' Content type 'application/x-gzip' length 2071758 bytes (2.0 Mb) URL ouverte

Dear Pavel Michna [maintainer of the package] (and copy to R-help Mailing List) When I try to load the package RNetCDF (after install from CRAN) I get this message: > library("RNetCDF", lib.loc="/Library/Frameworks/R.framework/Versions/3.0/Resources/library") Error : .onLoad a ?chou? dans loadNamespace() pour 'RNetCDF', d?tails : appel : NULL erreur : I/O error

When optim() is used with method="BFGS", the name of parameters within the vector are transmitted (see below, first example). When method="Brent", the name of parameter (only one parameter can be fitted with Brent method) is not transmitted. As there is only one, of course, we know which parameter it is, but it makes things non-consistent between methods. It would be

Dear R-er, I would like format integer number as characters with leading 0 for a fixed width, for example: 1 shoud be "01" 2 shoud be "02" 20 should be "20" Now I use: x <- c(1, 2, 20) gsub(" ", "0", format(x, width=2)) But I suspect more elegant way could be done directly with format options, but I don't find. Thanks a lot Marc

Dear R-er, I would like format integer number as characters with leading 0 for a fixed width, for example: 1 shoud be "01" 2 shoud be "02" 20 should be "20" Now I use: x <- c(1, 2, 20) gsub(" ", "0", format(x, width=2)) But I suspect more elegant way could be done directly with format options, but I don't find. Thanks a lot Marc

I just try the new R version 3.0.0. All is good until now. However, I had the surprise to see that all packages are not available. Until now I found one missing for OSX among these I used: maptools Is there a list of packages that were available in CRAN for 2.15 version and no more available ? And thanks a lot for all the programmers and maintainers for this great software. Sincerely, Marc

I would like test AICc as a criteria for model selection for a glm using stepAIC() from MASS package. Based on various information available in WEB, stepAIC() use extractAIC() to get the criteria used for model selection. I have created a new extractAIC() function (and extractAIC.glm() and extractAIC.lm() ones) that use a new parameter criteria that can be AIC, BIC or AICc. It works as

I would like to create a function to convert data based on a class using as.numeric Similarly, using a plot, I do: plot.essai <- function(x, ...) {return(x*2)} d <- 10 class(d) <- "essai" plot(d) It works: [1] 20 attr(,"class") [1] "essai" Now same with as.numeric: as.numeric.essai <- function(x, ...) {return(x*2)} as.numeric(d) It does not work:

This is a question at the border between stats and r. When I do a glm with many potential effects, and select a model using stepAIC, many independent variables are selected even if there are no relationship between dependent variable and the effects (all are random numbers). Do someone has a solution to prevent this effect ? Is it related to Bonferoni correction ? Is there is a ratio of

Update taking into account the answer of Prof Ripley. ___________________________________________________ Below is a reproducing example that produces the crash. If I do exactly the same in R 3.1.2, it works perfectly. I have the lastest libcurl library (curl @7.40.0) installed So, perhaps indeed that the problem originates from RCurl, but the problem appears only in R 3.2. But before to