similar to: Defective pointer to tech report (PR#634)

Hi, Mark et al.: Thanks, Mark. Three comments: 1. Rvmmin was one of the methods I tried after Ravi directed me to optimx. It returned NAs for essentially everything. See my email of this subject stamped 4:43 PM Central time = 21:43 UTC. 2. It would be interesting to know if the current algorithm behind optim and optimx with

Hi. I just noticed the paper by Morales and Nocedal Remark on "Algorithm 778: L-BFGS-B: Fortran Subroutines for Large-Scale Bound Constrained Optimization". TOMS 2011; 38(1): 7 http://www.ece.northwestern.edu/~morales/PSfiles/acm-remark.pdf which describes a couple of improvements (speed and accuracy) to the original Netlib code which AFAICT is that still used by optim() via f2c.

Please keep messages on the list so others can pitch in. _Which_ words do you want to consider identical for the purpose of frequency count? _What_ do you want to plot? B. > On Aug 3, 2017, at 4:36 PM, Riaan Van Der Walt <Riaan.VanDerWalt at nwu.ac.za> wrote: > > Hallo Boris, > I've loaded the Rstem, Snowball. > But I am clueless how to get a list eg. whal* (whale,

Hi, I would like to call R's lbfgsb function from my C/C++ code by including R_ext/Applic.h and linking against libR. Currently, I am allocating memory for x (and the other input arrays for lbfgsb) in my C/C++ code via malloc/new. However, this gives a segmentation fault when executing the program. I tried to allocate x via PROTECT(x = NEW_NUMERIC(n)); x_p = NUMERIC_POINTER(x);. This compiles

Hello, know somebody a "nice" strategy to analyze a lot of binary variables with hundred to thousands of cases. P.S. One nice example for this and something more is the configurational approach from C.Ragin http://www.nwu.edu/sociology/tools/qca/qca.html ,but i fight with the complexity of my data and the speed of the contibuted software in TCL/TK and would attempt to implement

>>>>> Spencer Graves <spencer.graves at prodsyse.com> >>>>> on Sat, 8 Oct 2016 18:03:43 -0500 writes: [.............] > 2. It would be interesting to know if the > current algorithm behind optim and optimx with > method='L-BFGS-B' incorporates Morales and Nocedal (2011) > 'Remark on ?Algorithm 778:

I am new to R. Busy with Text Analysis. Need a script to find e.g whale, whales, whale's, whaler, whalers, whaling,... in Moby Dick Riaan

>>>>> Duncan Murdoch >>>>> on Sun, 26 Mar 2023 12:41:03 -0400 writes: > On 26/03/2023 11:54 a.m., J C Nash wrote: >> A tangential email discussion with Simon U. has >> highlighted a long-standing matter that some tools in the >> base R distribution are outdated, but that so many >> examples and other tools may use

Dear list, The task view on optimization does not reference a package for non linear constrained optimization problems. Stefan Theussl told me to look at the Rsolnp package, but unfortunately it is not very clear what method is R ported. (The authors ported the matlab code of Yinyu Ye http://www.stanford.edu/~yyye/ <http://www.stanford.edu/%7Eyyye/>) Currently I'm looking for an

And, here''s a fix. -----Original Message----- From: David Zhao <dzhao@LURK.KELLOGG.NWU.EDU> To: BUGTRAQ@NETSPACE.ORG <BUGTRAQ@NETSPACE.ORG> Date: Sunday, May 17, 1998 3:00 PM Subject: simple kde exploit fix >in kdebase/kscreensaver/kscreensave.cpp: > >change: >line 18: strcpy( buffer, getenv("HOME") ); > to >

I'd note that the mkisofs man page listed about a dozen different formats used in various contexts to store Mac resource forks and finder metadata in various contexts. I'd imagine the advent of MacOSX (with UFS support) has narrowed the field of what options are common somewhat, but it's an area where a lot of ad-hoc solutions made it out to the real world. On the other hand, the

Dear List, My question is whether it is possible (and if so, how) to enter values into R vectors (R_OUTFILE, and R_INFILE in my example below) from the command line. In particular, I would like to run R, as a BATCH job, from a shell script, such as the following: while read inputfile_name outputfile_name; do R_OUTFILE=$outputfile_name R_INFILE=$inputfile_name R BATCH infile.R done

Hello - 1. Is there any way to directly export R plots to MIF format for import into FrameMaker? 2. If not, how hard would it be to add such a device driver? I don't see device driver docs in the R extensions docs. Are drivers contained in their own source files with simple interfaces to the data structures with plot data? 3. If that's difficult, what workarounds are

I am currently doing a research paper that requires the estimation of a thereshold model. I have gone through the reference manual for the pacjage "tsdyn" and i am failing to see how the the threshold models provided by R can estimate a model in which the other control variables exist or are included in the estiamtion of the model. Any help provided will be greatly appreciated Andrew

I received this from Matt Jockers and it worked! I missed something. How can I now see(display) this list? Hi Riann, There are a couple of ways that you could do this. . . the best approach would probably be to use *grep* instead of *which*, but let me show you both ways. On page 30, replace whales.v <- which(moby.word.v == *whale*) with whale_words <- c(*whale", *whales",

Dear all, I am trying to read a bunch of csv files using read.table() that are named "test_xxxxxx.csv" where "xxxxxx" has no particular pattern. Is there a way of reading all the files by specifying a truncated file name e.g. "test_" with some wild card characters, or would I have to laboriously create some vector with the "xxxxxx" names and iterate or

_______________________________________________________________________________________ Hi, I was just wondering if there was any available R code that could handle general constrained optimisation problems. At the moment I'm using nlminb and optim, both of which allow box constraints on the parameters, but ideally I'd like to be able to specify more general constraints on the solution

Hi All, Is the Levenberg-Marquardt algorithm available in R. This method combines the steepest descent algorithm and Newton's method. Thanks in Advance, Dermot MacSweeney. ************************************************************** Dermot MacSweeney NMRC, Email: dsweeney at nmrc.ucc.ie Lee Maltings, Tel: +353 21 904178 Prospect Row, Fax: +353 21 270271 Cork, WWW:

I'm getting a number of compiler warnings about type mismatches, building openssh-3.0.2p1 on HP-UX 10.20 with the HP ANSI C compiler. The resulting code seems to work, but spot-checking suggested that some of the warnings are the result of mixing int and u_int types, which might introduce subtle bugs. I figured it might be worth reporting, since I'm in the minority of people not

Hello: The development version of Ecdat on R-Forge contains a vignette in which optim(?, method=?L-BFGS-B?) stops with an error message while violating the lower bound. To see all the details, try the following: install.packages("Ecdat", repos="http://R-Forge.R-project.org") Then do "help(pac=Ecdat)" -> "User guides, package