similar to: update R version in windows

This issue does not exist on Linux. My Ubuntu updates both R and all packages. Stephen B -----Original Message----- From: J C Nash [mailto:profjcnash at gmail.com] Sent: Friday, November 10, 2017 1:19 PM To: r-help; RICHARD M. HEIBERGER; Bond, Stephen Subject: Re: [R] update R version in windows However, trying this on Linux Mint gave package ?installr? is not available (for R version

Is there a utility which will allow me to upgrade my R version and update all packages from the old version? If I manually upgrade, then I have to manually re-install 50 packages. Thank you. Stephen B [[alternative HTML version deleted]]

Over a week ago (on r-help, my bad!) I raised a question of why the ubuntu install instructions https://cran.r-project.org/bin/linux/ubuntu/README.html instruct users with a xenial-based system to use deb https://cloud.r-project.org/bin/linux/ubuntu xenial-cran40/ Looking at https://cloud.r-project.org/bin/linux/ubuntu/ there is no xenial-cran40 directory. However,

Just to clarify and hopefully catch the attention of the maintainer: The newXMLNode function is not mentioned in: https://cran.r-project.org/web/packages/XML/XML.pdf which supposedly describes all functions in the package. Stephen From: Ben Tupper [mailto:btupper at bigelow.org] Sent: Thursday, March 22, 2018 10:40 AM To: Bond, Stephen Cc: r-help Subject: Re: [R] how to add a child to a

Hi, It's a reasonable question. The answer is that it actually is included, but there are many instances across packages where multiple functions are documented on a single help page. The following brings up such a page... (for XML_3.98-1.9) > library(XML) > ?newXMLNode You can see the same on line... https://www.rdocumentation.org/packages/XML/versions/3.98-1.9/topics/newXMLDoc

Big thanks. newXMLNode works great. Wonder why it is not included in the documentation. There is newXMLDoc and newXMLNamespace, but no mention of newXMLNode. Stephen From: Ben Tupper [mailto:btupper at bigelow.org] Sent: Wednesday, March 21, 2018 6:18 PM To: Bond, Stephen Cc: r-help Subject: Re: [R] how to add a child to a child in XML Hi, XML doesn't use the `$` to access child nodes.

Not convinced Jeff is completely right about this not concerning R, since I've found that the application language (R, perl, etc.) makes a difference in how files are accessed by/to OS. He is certainly correct that OS (and versions) are where the actual reading and writing happens, but sometimes the call to those can be inefficient. (Sorry, I've not got examples specifically for file

Thanks Brian. Indeed, the vignette is in markdown form. When I updated my system to R 3.1.3 I ran update.packages() and this seems to have upset things (including R-studio processing of markdown files). I tried removing rmarkdown and reverting to an older version so that my sessionInfo() is Loading required package: rmarkdown > sessionInfo() R version 3.1.3 (2015-03-09) Platform:

As the original coder (in mid 1970s) of BFGS, CG and Nelder-Mead in optim(), I've been pushing for some time for their deprecation. They aren't "bad", but we have better tools, and they are in CRAN packages. Similarly, I believe other optimization tools in the core (optim::L-BFGS-B, nlm, nlminb) can and should be moved to packages (there are already 2 versions at least of LBFGS

The cautions people have given about starting values are worth heeding. That nlxb() does well in many cases is useful, but not foolproof. And John Fox has shown that the problem can be tackled very simply too. Best, JN On 2023-08-19 18:42, Paul Bernal wrote: > Thank you so much Dr. Nash, I truly appreciate your kind and valuable contribution. > > Cheers, > Paul > > El El

Despite my years with R, I didn't know about trace(). Thanks. However, my decades in the minimization and root finding game make me like having a trace that gives some info on the operation, the argument and the current function value. I've usually found glitches are a result of things like >= rather than > in tests etc., and knowing what was done is the quickest way to get there.

Prof Nash, Prof Galanos Is it possible to use a generic code stub in front of packages that use optimx to improve optimx use or curtail it according to the requirements? Best Regards Amit +91 7899381263 ________________________________________________________________________ Please request Skype as available 5th Year FPM (Ph.D.) in Finance and Accounting Area Indian Institute

Thank you so much Dr. Nash, I truly appreciate your kind and valuable contribution. Cheers, Paul El El s?b, 19 de ago. de 2023 a la(s) 3:35 p. m., J C Nash < profjcnash at gmail.com> escribi?: > Why bother. nlsr can find a solution from very crude start. > > Mixture <- c(17, 14, 5, 1, 11, 2, 16, 7, 19, 23, 20, 6, 13, 21, 3, 18, 15, > 26, 8, 22) > x1 <- c(69.98, 72.5,

Caching happens, both within the operating system and within the C standard library. Ostensibly the intent for those caches is to help performance, but you are right that different low-level caching algorithms can be a poor match for specific application level use cases such as copying files or parsing text syntax. However, the OS and even the specific file system drivers (e.g. ext4 on flash disk

In looking at rootfinding for the histoRicalg project (see gitlab.com/nashjc/histoRicalg), I thought I would check how uniroot() solves some problems. The following short example ff <- function(x){ exp(0.5*x) - 2 } ff(2) ff(1) uniroot(ff, 0, 10) uniroot(ff, c(0, 10), trace=1) uniroot(ff, c(0, 10), trace=TRUE) shows that the trace parameter, as described in the Rd file, does not seem to be

Thanks Caitlin and Richard MH. Works great. Stephen From: Caitlin [mailto:bioprogrammer at gmail.com] Sent: Friday, November 10, 2017 12:33 PM To: Bond, Stephen Subject: Re: [R] update R version in windows install.packages("installr") updateR() rather... On Friday, November 10, 2017, Bond, Stephen <Stephen.Bond at cibc.com<mailto:Stephen.Bond at cibc.com>> wrote: Is

Despite the need to focus on pbeta, I'm still willing to put in some effort. But I find it really helps to have 2-3 others involved, since the questions back and forth keep matters moving forward. Volunteers? Thanks to Martin for detailed comments. JN On 2020-03-26 10:34 a.m., Martin Maechler wrote: >>>>>> J C Nash >>>>>> on Thu, 26 Mar 2020

Hi, XML doesn't use the `$` to access child nodes. Instead use either `[name]` to get a list of children of that name or `[[name]]` to get the just the first child of that name encountered in the genealogy. Thus for your example... > root$child1 NULL > root[['child1']] <child1 name1="A" name2="B" name3="C"/> On the other hand, you might

Hi there Thanks for your answers. I didn't expect that this would be so complex. Honestly, I don't understand everything you wrote since I'm not an IT specialist. But I read something that reading *.rds files is faster than loading *.Rdata and I wanted to proof that for my system and R version. But thanks anyway for your time. Cheers Raphael > -----Urspr?ngliche Nachricht-----

Try choose.files choose.files(default = file.path(mydir, "*.*"), multi = FALSE) On Wed, Dec 18, 2024 at 10:33?AM J C Nash <profjcnash at gmail.com> wrote: > > I've been working on a small personal project that needs to select files for manipulation from > various directories and move them around in planned ways. file.choose() is a nice way to select > files.