similar to: Re: Optimizing a nonlinear function

Displaying 20 results from an estimated 20000 matches similar to: "Re: Optimizing a nonlinear function"

2002 Jan 22
0
(PR#1274) data(): Error in FUN(X[[2]], ...) : subscript
data() is making assumptions about the structure of the 00Index files that are not warranted. All `Writing R Extensions' says is The @file{data} subdirectory should also contain a @file{00Index} file that describes the datasets available. Ideally this should have a one-line description of each dataset, with full documentation in the @file{man} directory. whereas data() is assuming
2004 Oct 23
0
Re: (PR#7304) library.dynam() & .dynLibs() do not work as
Filing on R-bugs (DTL's reply started a new PR). -- Brian D. Ripley, ripley@stats.ox.ac.uk Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595 ---------- Forwarded message
2006 Jul 07
0
User Error (was LOESS (PR#9064))
Please do as we ask (repeatedly) and study the help page before posting. 'family' is a separate argument, not part of loess.control, as the help page correctly documents. If you use cars.lo2 <- loess(dist ~ speed, cars, family = "symmetric", control = loess.control(surface = "direct", iterations = 20)) cars.lo2$pars$iterations it prints *20*, as it is
2005 Jan 12
0
RODBC package -- sqlQuery(channel,.....,nullstring=0)stillgives NA's
(1) I do read the posting guide (the fact that I missread o missunderstood something does not imply not reading) (2) I could change NAs to 0 (I know) but I have previously (older versions of R and SQL*Plus) used the same select with the "right" output (namely with 0s). (3) AFAIK "strange" is not a negative remark and does not seem to me at the very least but that is always a
2003 Aug 05
0
RE: [R] ^ operation much slower in R 1.7.1 than in R 1.7 .0 ???
I used the packaged "MinGW-2.0.0-3.exe" exactly as specified on http://www.stats.ox.ac.uk/pub/Rtools/ - in fact I used these recommendations throughout. According to the release notes MinGW version 2.0.0 contains the following list of packages: GCC-3.2-core-20020817-1 binutils-2.13-20020903-1 mingw-runtime-2.2 w32api-2.0 gdb-5.1.1-1 make-3.79.1-20010722 (binary renamed as mingw32-make)
2008 Jun 02
0
(PR#11537) help (using ?) does not handle trailing whitespace
>>>>> "BDR" == Prof Brian Ripley <ripley at stats.ox.ac.uk> >>>>> on Fri, 30 May 2008 22:34:28 +0100 (BST) writes: BDR> I think it is ESS that is parsing this as a help BDR> request (so it can divert it to an ESS buffer). BDR> Looks like this is an ESS issue, not an R one. yes, indeed, hence much more belonging the ESS-help
2000 May 01
1
GAMs under R?
At 06:09 AM 5/1/00 +0100, Prof Brian D Ripley wrote: >On Sun, 30 Apr 2000, Stephen R. Laniel wrote: > >> I was just now surprised to note that functions to go generalized additive >> models don't appear to exist under R 1.000. In particular, the gam() and >> loess() functions aren't there. Are they hidden somewhere and I just >> haven't noticed? >
2004 Oct 22
0
Re: library.dynam() & .dynLibs() do not work as documented
Duncan, I don't know what we want, but it is not a simple matter of documenting what .dynLibs currently does. What I see as bugs are 1) the inconsistent names and types of the components returned by .dynLibs(). 2) the inconsistent inclusion or not of R_X11 in the list returned by .dynLibs(). 3) the inclusion of static info (base) by library.dynam(). 4) including loadable modules
2005 Oct 05
0
Ad: Re: Ad: Re: R crashes for large formulas in lm() (PR#8181)
On Wed, 5 Oct 2005 Hallgeir.Grinde at elkem.no wrote: > Yes. > so (x1*x2*x3*x4*x5*x6*x7*x8)^2 = (x1+x2+x3+x4+x5+x6+x7+x8)^8 ? Yes in the sense that the simplified formula given by terms() is the same. > and there is a difference in > (x1*x2*x3*x4*x5*x6*x7*x8)^2 > and > (x1*x2*x3*x4*x5*x6*x7*x8) > althoug the resulting formulas are the same, or? The first is reduced to the
2005 Feb 08
0
RE: [R] Windows Printing and Line Widths
... Moved from R-help ... Thank you for your suggestion, Professor Ripley. Postscript does seem like the way to go for printing line widths correctly in Windows. On Linux I am using a simple dev.print() wrapper (as suggested), with a pipe to lpr. However, I had an extremely difficult time getting postscript printing under windows. ?postscript recommends the RedMon suite of tools for printing
2008 Nov 14
0
(PR#13283) R crashes on sprintf with bad format
But %S is not valid in C99 or POSIX, even if it is a variant in some systems. I am working on a more careful checker right now, but there will be limits to what we can catch: this was already a pretty rare example. Brian On Fri, 14 Nov 2008, William Dunlap wrote: >> From: r-devel-bounces at r-project.org >> [mailto:r-devel-bounces at r-project.org] On Behalf Of Prof Brian Ripley
1998 Nov 16
0
VR and tree libraries for 0.63
These are now at CRAN (at least in Vienna). Please note that VR_5.3pl030-1.tar.gz really does need 0.63: there are problems with 0.62.x and 0.63 reading .rda files written by the other. The earlier VR_5.3pl027-1.tar.gz for 0.62.3/4 remains on CRAN in directory Old/0.62. tree_0.3-1 adds tree.screens and tile.tree (needs 0.63), and support for formulae like use ~ . - estperf - names. -- Brian
1998 Nov 16
0
VR and tree libraries for 0.63
These are now at CRAN (at least in Vienna). Please note that VR_5.3pl030-1.tar.gz really does need 0.63: there are problems with 0.62.x and 0.63 reading .rda files written by the other. The earlier VR_5.3pl027-1.tar.gz for 0.62.3/4 remains on CRAN in directory Old/0.62. tree_0.3-1 adds tree.screens and tile.tree (needs 0.63), and support for formulae like use ~ . - estperf - names. -- Brian
2002 Jun 19
0
[R] Problems with url/download and http_proxy
This does seem to fix my problem: > Sys.getenv("http_proxy") http_proxy "http://gproxy1.pfizer.com/" > url("http://cran.r-project.org/src/contrib/PACKAGES",'r') description "http://cran.r-project.org/src/contrib/PACKAGES" class
2003 Jun 27
1
R-help Digest, Vol 4, Issue 27 ( -Reply)
Hi, I am out of town and will get back to you on the 13th of July. Leo >>> "r-help at stat.math.ethz.ch" 06/27/03 00:32 >>> Send R-help mailing list submissions to r-help at stat.math.ethz.ch To subscribe or unsubscribe via the World Wide Web, visit https://www.stat.math.ethz.ch/mailman/listinfo/r-help or, via email, send a message with subject or body
2001 Jan 15
2
WMF on Unix
A few of you have helpfully sent me references to WMF formats. There is also some code to _read_ it at http://www.csn.ul.ie/~caolan/docs/libwmf.html However, the issue is to _write_ WMF on R under Unix. I am told (by someone who has tried) that the problem is the if you write a WMF file according to the published specs (which were once issued by Microsoft) you find that e.g. Word does not read
2002 Aug 06
0
pipe and binary i/o (on Linux)
Thanks very much, Professor Ripley. Reid Huntsinger -----Original Message----- From: ripley at stats.ox.ac.uk [mailto:ripley at stats.ox.ac.uk] Sent: Tuesday, August 06, 2002 3:00 AM To: Huntsinger, Reid Cc: r-help at stat.math.ethz.ch Subject: Re: [R] pipe and binary i/o (on Linux) On Mon, 5 Aug 2002 ripley at stats.ox.ac.uk wrote: > pipe predates readBin, and no one has seen a
2000 Aug 28
0
under certain conditions, model.matrix appears to lack one (PR#648)
On Mon, 28 Aug 2000, Rashid Nassar wrote: > Dear Professor Ripley, > > Thank you very much for your kind explanation. If I may lamely say > something in my defence, even as I apologize for my error: I mistook the > sentence "the (quoted) name of a function" to mean "optionally quoted" > because of the parentheses surrounding "quoted", and was
2010 Jun 09
2
Question on trying to build R 2.11.1 on Tru64(aka OSF1)
First I tried 'setenv R_SHELL /usr/local/bin/bash', as bash is the weapon of choice for the faculty wishing to use R, then ran ./configure as before. The ./configure output line using as R_SHELL for scripts ... /usr/local/bin/bash would seem to indicate that the R_SHELL environment variable was recognized and acknowledged. However, I got the same build error: gnumake[2]: Entering
2001 Aug 21
0
Re: [R] Problem using GLM in a loop (fwd)
This example is caused by R's messing with formula environments. That's explained in ?formula, but should it not be explained in ?model.frame ? Simple test: data <- data.frame(y=rnorm(100), x=1:100) testit <- function(formula) { weights <- runif(100) glm(formula, weights=weights, data=data) } testit(y ~ x) weights is looked for in the environment of the formula, not of