search for: zhuw

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

...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

...how do I set up my Makefile, or maybe other files, such that I have the same result as I did to compile and run these Fortran files directly. Thanks in advance. -- Zhu Wang Statistical Science Department Southern Methodist University Dallas, TX 75275-0332 Phone:(214)768-2453 Fax:(214)768-4035 zhuw at mail.smu.edu

...venue, 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 stats.ox.ac.uk > > Cc: zhuw at post.cis.smu.edu; whitcher at ucar.edu > > Subject: Re: [R] unable to open connection > > > > ripley at stats.ox.ac.uk wrote: > > > > > > It works here on Windows with R 1.6.2. I rebuilt the precompiled > > version, > > > as that seems no longe...

...ust 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>

...ng 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(data) {(esti<- ar(data)) return(predict(...

Dear all, I have a problem to build a package on Windows XP while there is no problem on Linux. The Makefile is something like: ########### LIBNAME=cts PKG_LIBS = $(LAPACK_LIBS) $(BLAS_LIBS) $(FLIBS) OBJS=file1.o ... file20.o -llapack -lblas $(LIBNAME)$(SHLIB_EXT): $(OBJS) $(SHLIB_LD) $(SHLIB_LDFLAGS) -o $@ $(OBJS) $(FLIBS) clean: @rm -f *.o *.$(SHLIB_EXT) realclean: clean

Dear list members, I have problem to load data of the library waveslim. After I load the library waveslim and tried to load data ibm data(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

Dear helpers, I was wondering if there are some bivariate distribution simulation functions in any R packages. Specifically, I want to simulate bivariate log logistic, bivariate Weibull, or other common bivariate life time functions, and I can specify the correlations. Any comments about this will be appreciated. Thanks, Zhu Wang

Dear helpers, When I use the function cgt of library Rwave, the time axis of the plot is always on the [0,1] scale regardless of the original time. This happedn when I tried to reproduce some pictures of "Practical Time-Frequency Analysis", e.g. Figure 3.5 and 3.6 using the codes provided in the book. But the figures of the book display the real sampling time using the same codes.

Dear R-Help, I am trying to use R to solve a nonlinear equation many times for different values. I am looking for a mathematical nonlinear equation solution which may not have a closed solution form. For example, I have equation: 2 = (t^2)/log(t) What is t? I am wondering how to solve it in R. Many thanks, Zhu Wang Statistical Science Department SMU.

> Message: 4 > Date: Sun, 27 Jun 2004 03:18:43 -0400 > From: Lei Liu <liulei at l.imap.itd.umich.edu> > Subject: [R] help in R calling C function > To: r-help at stat.math.ethz.ch > Message-ID: <5.1.0.14.1.20040627030746.014936b8 at l.imap.itd.umich.edu> > Content-Type: text/plain; charset="us-ascii"; format=flowed > > Hi there, > > I want