similar to: compatibility S-plus R: stepwise fonction

Hi everybody, Hope your are not all on holyday because I've got a problem that is going to drive me crazy... I would like to remove some rows from a dataframe. The rows correspond to some specific indexes which I can get by looking at the name in the first column of my dataset. But I manage to get only the opposite of what I really want (function #1) #Function#1:

Hi, I would like to create data.frame and increment their name to finally merge them. Does anybody has a solution ? Something like that ? n<-6 for (i in 1:n) { m[i]<-data.frame(name,value) m<-merge(m[i]:m[n]) } Nolwenn ******************************************** Nolwenn Le Meur INSERM U533 Facult? de m?decine 1, rue Gaston Veil 44035 Nantes Cedex 1 France Tel:

Hi, Does anybody try to write CGI script using RSPerl package ? I am interested in RWeb but that doesn't really do what I want. In fact I would like the user to load the file to analyze; then a R program will treat the data ,display resulting graphs and save results in text files. I have test the following script by John Barnett without success. #!/usr/lib/R/bin/R.bin --source

Hi everybody, just a quick question that drives me crazy: Is it possible to "join" 2 logical vectors ? i.e. x<-4 ind <- 1:19200 pin <- c(0, rep(400, 48) * (1:48)) ind1<-((pin[j] + 1) <= ind) & (ind <= pin[j + 2]) ind2<-((pin[j+x] + 1) <= ind) & (ind <= pin[j+x + 2]) ind2 and ind1 give the right TRUE index #but I would like something like that

Maybe a stupid question: In a plot, which parameter(s) ables to visualize the axis like in a coplot where the axis is also visible in the plot background ? Thanks Nolwenn ******************************************** Nolwenn Le Meur INSERM U533 Facult? de m?decine 1, rue Gaston Veil 44035 Nantes Cedex 1 France Tel: (+33)-2-40-41-29-86 (office) (+33)-2-40-41-28-44 (secretary)

Hi, I've started to create the documentation of my package. I've generate a pdf and the different html files from .Rd files. However I don't know how to automatically generate the 00Index.html. Do I have to write one in latex style and convert it or can I use the CONTENTS, INDEX, or Rd files. Thanks Nolwenn ******************************************** Nolwenn Le Meur INSERM U533

oops, Forgot to cc to the list. Regards, Mike -----Original Message----- From: dr mike [mailto:dr.mike at ntlworld.com] Sent: 24 February 2005 19:21 To: 'Spencer Graves' Subject: RE: [R] Bayesian stepwise (was: Forward Stepwise regression based onpartial F test) Spencer, Obviously the problem is one of supersaturation. In view of that, are you aware of the following? A Two-Stage

Hi, Stupid question I guess but I can't figure out how to have a span of 0.5 instead of 1 in my graph. Actually, I want to create a plot with x(-2,2) and y(-2,2) and an step of 0.5 along the axis. Does somebody can help me ? Is it in par(), axis() or plot() that I have to add something ? Thanks Nolwenn *------------------------------------------* Nolwenn Le Meur INSERM U533 Facult? de

HI, I would like to know if it's possible to create a postscript file with multiple graphs . I'm creating some graphs by the means of a loop and I want to save each graph in the same file (splitting making the device by the number of graphs). Do I have to use the par(matrix()) option, the layout() function or the split.screen() one ? Thanks Nolwenn

Hi, I would like to save a plot without opening the device window (no display). Is it possible ? How can I do it ? Thanks Nolwenn *------------------------------------------* Nolwenn Le Meur INSERM U533 Facult? de M?decine 1, rue Gaston Veil 44035 Nantes cedex 1 t?l: +33(0)2-40-41-29-86 fax: +33(0)2-40-41-29-50 e-mail: nolwenn.lemeur at nantes.inserm.fr

Hello, I have a question pertaining to the stepwise regression which I am trying to perform. I have a data set in which I have 14 predictor variables accompanying my response variable. I am not sure what the difference is between the function "mle.stepwise" found in the wle package and the functions "step" or "stepAIC"? When would one use

Dear Gurus, Thank you in advance for your assistance. I'm trying to understand scope better when performing stepwise regression using "step." I have a model with a binary response variable and 10 predictor variables. When I perform stepwise regression I define scope=.^2 to allow interactions between all terms. But I am missing something. When I perform stepwise regression (both

Hi, I have just started using lattice and it looks great. But I already have 3 questions about xyplot display. ---------------------------------------------------------------------------- --------------------------------- 1.I would like to create two differeny xyplot with different color to identify my different groups but I have trouble applying colors. Here are the scripts

Hi, S-PLUS includes the function "stepwise" which can use a variety of methods to conduct stepwise multiple linear regression on a set of predictors. Does a similar function exist in R? I'm having difficulty finding one. If there is one it must be under a different name because I get an error message when I try 'help(stepwise)' in R. Thanks for your help, Andy Taylor

Hello, I have been using the step() function for stepwise regression and was wondering if there was a way to specify a tolerance level either using step() or another stepwise function. So far I have only found an option to specify tolerance in lm.fit() but I am not an experienced R user and am not quite sure if this command can be implemented using a stepwise function. I have tried simply

Hi, I know that is not possible make a stepwise procedure using REML in R, I can use ML for this. For nested design it may be very dangerous due the difference in variance structure, mainly in a splitplot design. ML make significative variables that REML dont make. I read an article that is made a stepwise procedure using GENSTAT. from article: "Terms were dropped from a model in a

 Hi, Is there any function available to do stepwise selection of variables in Conditional(matched) logistic regression( clogit)? step, stepwise  etc are failing in case of conditional logistic regression. Please help.  Thanks P.T. Subha [[alternative HTML version deleted]]

I have a question regarding doing forward stepwise regression using the step function and an lm model. I am trying to run a stepwise procedure that will add a predictor variable, one at a time, conduct an F test to determine whether or not to drop any previous terms, and terminate when no other predictors qualify to be added. Using the step function and looking at the example in the book, I

Hi everyone, I am wondering if there exists a stepwise regression function for the Bayesian regression model. I tried googling, but I couldn't find anything. I know "step" function exists for regular stepwise regression, but nothing for Bayes. Thanks -- View this message in context: http://www.nabble.com/Bayesian-regression-stepwise-function--tp26013725p26013725.html Sent from

Dear forum members, hope you can understand my unprofessionell English. I have never been working with RStudio before (even not with R), so I immediately need some help, because I want to carry out an automated multiple stepwise linear regression between temperatures and different surface parameters. Data can be found in several .xls- or .csv-files within one folder. Files are named