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Hello, I would like to know if somebody has an algorithm in R langage for building Latin hyper cube ? Thanks in advance Isabelle

Hi, I would like to have some advise about how to install Dopt on R for Windows. I can not manage to properly compile Dopt.f anf to get a suitable dll for R. Can someone explain me step by...

Hello, I have implemented a method which uses sink to follow the progression status of an iterative process (Below is part of the code) I have already used such kind of code with no problem. Today, I get a "sink...

Hello, I am using the function "lm" to fit several responses at the same time (100 responses). At the end of the fit, I get an object of class "mlm". I would like to know if there is a way...

Hello, I've just fitted a model with multi-responses, and I get an object of class "lm" "mlm". My problem is that as soon as I invoke the predict method for a dataframe "newdata", the methods runs and give...

Hello, I would like to know where I can find a Windows binary version of R 1.6.2, since I want to test the last SJava library (which has been built under 1.6.2) which does not work...

Hello, I would like to fit several responses depending on the same parameters. Thus I generate an mlm object. On the other hand, for further analysis, I would like to be able to simplify as much as possible the models...

Hello, I want to call glm inside a function. In the first lines of code I build the weights, the formula, ... and then I call glm with the following command: glm(formularesp, data=data, family=familyresp, weights=eval(data$weights...

Hello, I would like to have some advises concerning checking glms quality for prediction. I've a glm with Gamma family and link=log, and I would like to compute a Press statistic to check the predictivity of my model...

Hello, I would like to know if there is a possibility to "clean" the R memory during a R session. In fact, I realize a lot of instruction with large objects (matrix of 500*5000), and I can not manage...

Hello, I would have some details and explanations about the results I get. In fact, I start with a uniform sample between -1 and 1, and then plot its density. My problem is that the density ranges are much more...

Hi, I have a problem with the memory size within R. I would like to know if there is any may for getting back free memory during a R session. I've tried with rm and gc but it still...

Hello, I wonder if anybody has some idea about how to solve my problem : I am working , I would say trough an experimental design approach (perform experiments, get responses, make regression, sensitivity analysis, risk analysis ...). The problem is now that...

Hello, I would like to know if there is a possibility to open an R session via Java (using the SJava package), then to terminate it, and re-run another. It seems not to be possible. If this is the...

Hello, I would like to have an advise about how to extract objects from a list of matrixs I have fitted models (stored in an object called "model") using a matrix response and the same formula and data. I get...

Hi, I am using optim with a L-BFGS-B method to minimize a function. As I've understood, the way to specify a tolerance for stopping optimization is through "factr" argument. My function, is by construction, minimal when equal...

Hi, I have some doubt about how qualitative factors are coded in R. For instance, I consider a response y, a quantitative factor x and a qualitative factor m at 3 levels, generated as follow : y_c(6,4,2...

Hello, I would like to treat a very simple case : to fit a linear model with 5 parameters (including main terms, interactions and quadratic terms using a central composite design with 27 runs) for a constant response (e.g resp...