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Dear all, Is there any generic algorithm code for optimization implemented in R? I searched without success. Thanks, -- Zhu Wang Statistical Science Department Southern Methodist University Phone: (214)768-2453 Fax: (214)768-4035 Email: zhuw at mail.smu.edu

...e, lib.loc = lib.loc, character.only = TRUE, logical.return = TRUE, : there is no package called 'rfe' Thanks in advance for any help/suggestions, Elizabeth McClellan elizabethmcclellan@gmail.com -- Ms. Elizabeth McClellan Research Assistant Department of Statistical Science Southern Methodist University [[alternative HTML version deleted]]

...ng values so I got an error message. Should I manually handle these missing values? I was trying to read the documents to specify any option related to missing values, but I did not find it. Please forgive me if I ignore something obvious. Thanks, Zhu Wang Statistical Science Department Southern Methodist University Dallas, TX 75275-0332 Phone: (214)768-2453 Fax: (214)768-4035 Email: zhuw at mail.smu.edu

...t have admin access, so so far as I can see pam_smb is the only option. Alternatively, does anyone know if it is possible to create an NT account whose only ability is to create machine accounts, which I could probably convince the NT domain admin to do for me? -- Martin Orr Linux Administrator, Methodist College Belfast

...#39;\0t\0e\0s\0t? iconv(s, to="UTF-16LE") #> Error in iconv(s, to = "UTF-16LE"): embedded nul in string: 't\0e\0s\0t\0? -------------------------- Michael Braun, Ph.D. Associate Professor of Marketing, and Corrigan Research Professor Cox School of Business Southern Methodist University Dallas, TX 75275

...[1] stats graphics grDevices utils datasets methods base -- Michael Hahsler, Assistant Professor Department of Engineering Management, Information, and Systems Department of Computer Science and Engineering (by courtesy) Bobby B. Lyle School of Engineering Southern Methodist University, Dallas, Texas office: Caruth Hall, suite 337, room 311 email: mhahsler at lyle.smu.edu web: http://lyle.smu.edu/~mhahsler

...ibm) Error in file(file, "r") : unable to open connection In addition: Warning message: cannot open file `ibm.txt'' I also tried other data sets without success. It works for other libraries though. Any suggestions? Thanks. Zhu Wang Statistical Science Department Southern Methodist University 3225 Daniel Avenue, Heroy 123 Dallas, TX 75275 Tel: (214)768-2453 Fax: (214)768-4035 [[alternate HTML version deleted]]

Thanks to Brian D. Ripley and Uwe Ligges. It works now. Zhu Wang Statistical Science Department Southern Methodist University 3225 Daniel Avenue, Heroy 123 Dallas, TX 75275 Tel: (214)768-2453 Fax: (214)768-4035 > > > > -----Original Message----- > > From: Uwe Ligges [mailto:ligges at statistik.uni-dortmund.de] > > Sent: Sunday, February 02, 2003 5:22 AM > > To: ripley at sta...

...x=order,plot=FALSE): lag.max must be at least 1 If I use ar(x), then I have Call (x=x) order selected 0 sigma^2 estimated as 5374 Obviously I missed some points for using ar. This is R 1.7.0 under Redhat Linux 9.0 Thanks in advance. Zhu Wang Statistical Science Department Southern Methodist University -- zhu wang <zhuw at mail.smu.edu>

>> Hi, I am trying to draw a random sample from an household survey with sample weight. Is there any function in R or Splus which allows this. Regards, ******************************************************* Mehtabul Azam Department of Economics Southern Methodist University Dallas TX 75275-0496 Tel: (214) 214 938 3906 Email: mazam at smu.edu <mailto:mazam at smu.edu> Web: http://people.smu.edu/mazam

Does anyone have experience about how to convert a matrix to binaryMatrix using Recommenderlab package? Thanks, Jing [[alternative HTML version deleted]]

While R has library TSP to help solve traveling salesperson problems, does anyone know if it has any libraries to help solve multiple traveling salesperson problems? For instance, suppose one is planning school bus routes and one has multiple buses. Thank you for your time. -- View this message in context:

Hi there, I've spent a while searching for ways of outputting table data from R in presentable formats, such as colored backgrounds for column headings, bold fonts etc. It appears that this is not possible, but I would be interested to learn if in fact there was a way of achieving this. Many thanks! [[alternative HTML version deleted]]

I read the documentation below to mean that: solve_TSP( tsp_input, '2-opt', rep=99 ) will use the 2-opt method on the tsp_input variable 99 times. Catch: I get an "unused input" error. Q: Am I reading the docs (Item 1, below) correctly or is this a problem with solve_TSP ignoring its inputs (Item 2, below). Item 1: solve_TSP doc: > library(TSP) >

...e demos, 'help()' for on-line help, or 'help.start()' for a HTML browser interface to help. Type 'q()' to quit R. [Previously saved workspace restored] > Thanks for your help. Monnie Monnie McGee, Ph.D. Assistant Professor Department of Statistical Science Southern Methodist University Ph: 214-768-2462 Fax: 214-768-4035

Suppose this is my list of transactions: set.seed(200) tran=random.transactions(100,3) inspect(tran) items transactionID 1 {item80} trans1 2 {item8, item20} trans2 3 {item28} trans3 I want to get the 'transpose' of the data, i.e. transactionID items 1 {trans2} item8 2 {trans2} item20 3 {trans3} item28 4 {trans1} item80 I

...y let me what's the answer if any for the following sunspot example from the package help: data(sunspot) (sunspot.ar <- ar(sunspot.year)) # why not just sunspot.ar <- ar(sunspot.year) ? predict(sunspot.ar, n.ahead=25) Thanks in advance. Zhu Wang Statistical Science Department Southern Methodist University (214)768-2453 -- zhu wang <zhuw at mail.smu.edu> # time series prediction func<-function(data) {(esti<- ar(data)) return(predict(object=esti,newdata=data,n.head=5)) } func1<-function(y) {(esti<- ar(y)) return(predict(esti,n.head=5)) } func2<-function(...

...provided in the book. But the figures of the book display the real sampling time using the same codes. It seems there is no argument for the time scale for 'cgt'. Is this a bug or my misunderstanding? Hope somebody can help me. Thanks, Zhu Wang Statistical Science Department Southern Methodist University

Hello. I have a general question regarding to clustering of association rules. According to http://cran.r-project.org/web/packages/arules/vignettes/arules.pdf "4.7 Distance based clustering transactions and associations" there is possibility for creating clusters of association rules. I do not understand, how I have to interpret clusters of rules. Let us have next association rules and

Greetings, I am having trouble getting the function reformulate_ATSP_as_TSP to work for me. I have provided a simple example of some of the code I've been using. In particular, I'm not sure why I'm getting the error "Error in dimnames(tsp) <- list(lab, lab) : length of 'dimnames' [1] not equal to array extent" since I created the object ATSP with a valid