similar to: R-devel Digest, Vol 112, Issue 8

While lm() is a linear modeling, the constraints make it easier to solve with a nonlinear tool. Both my packages Rvmmin and Rcgmin (I recommend the R-forge versions as more up-to-date) have bounds constraints and "masks" i.e., fixed parameters. I am actually looking for example problems of this type that are more recent than the ones that got me into this 30 years ago. Do contact me

Dear R users I have tried to install the optimx but met problems. I have gone to the website you suggested: https://r-forge.r-project.org/R/?group_id=395 and tried to install it with the following method: install.packages("optimx", repos="http://R-Forge.R-project.org") I have received the following information: package 'numDeriv' successfully unpacked and MD5

> I have a problem. I am using the NLME library to fit a non-linear model. There is a linear component to the model that has a couple parameter values that can only be positive (the coefficients are embedded in a sqrt). When I try and fit the model to data the search algorithm tries to see if a negative value for one of these parameter values will produce an optimal fit. When it does so,

I've searched to find examples of how to work with the C versions of optim. I've separated out the function just to test on it alone, and currently I'm attempting to use fmmin as follows: !~~CODE ~~! double optimfn(int n, double *par, void *ex) { double * lambda = (double*)malloc(sizeof(double)*n); double sum = 0; for(int i =0; i < n; i++) { lambda[i] =

I have not included the previous postings because they came out very strangely on my mail reader. However, the question concerned the choice of minimizer for the zeroinfl() function, which apparently allows any of the current 6 methods of optim() for this purpose. The original poster wanted to use Newton-Raphson. Newton-Raphson (or just Newton for simplicity) is commonly thought to be the

Hi Spencer: See the link below about L-BFGS-B below because I had problems with it a good while back (and I think the link description is the cause but I can't prove it ) so eventually I moved to the Rvmmin(b) package. It's a package but really an algorithm. Rvmmin(b) uses a variable-metric algorithm similar to that of L-BFGS-B but without the problem below. It's not surprisingly a

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

This kind of error seems to surprise R users. It surprises me that it doesn't happen much more frequently. The "BFGS" method of optim() from the 1990 Pascal version of my book was called the Variable Metric method as per Fletcher's 1970 paper it was drawn from. It really works much better with analytic gradients, and the Rvmmin package which is an all-R version that adds bounds

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 them that they cannot be deprecated. The examples that I am most familiar with concern optimization and nonlinear least squares, but other workers will surely be able to suggest cases elsewhere. I was the

>>>>> 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

I'll not copy all the previous material on this thread to avoid overload. The summary is that all the methods Spencer has tried have some issues. The bad news: This is not uncommon with optimization methods, in part because the problems are "hard", in part because getting them implemented and linked to an interfacing approach like R is very tedious and prone to omissions and

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 them that they cannot be deprecated. > > The examples that I am most familiar with concern optimization and nonlinear > least squares, but

Define resend_irq_on_evtchn() which ia64/xen uses. Although it isn't used by current x86/xen code, it's arch generic so that put it into common code. Signed-off-by: Isaku Yamahata <yamahata at valinux.co.jp> --- drivers/xen/events.c | 16 ++++++++++++++++ include/xen/events.h | 1 + 2 files changed, 17 insertions(+), 0 deletions(-) diff --git a/drivers/xen/events.c

Define resend_irq_on_evtchn() which ia64/xen uses. Although it isn't used by current x86/xen code, it's arch generic so that put it into common code. Signed-off-by: Isaku Yamahata <yamahata at valinux.co.jp> --- drivers/xen/events.c | 16 ++++++++++++++++ include/xen/events.h | 1 + 2 files changed, 17 insertions(+), 0 deletions(-) diff --git a/drivers/xen/events.c

https://bugzilla.netfilter.org/cgi-bin/bugzilla/show_bug.cgi?id=112 Summary: String Match GCC 3.3 errors Product: netfilter/iptables Version: patch-o-matic Platform: other OS/Version: other Status: NEW Severity: minor Priority: P2 Component: unknown AssignedTo: laforge@netfilter.org

https://bugzilla.netfilter.org/cgi-bin/bugzilla/show_bug.cgi?id=112 netfilter@linuxace.com changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |netfilter@linuxace.com Status|NEW |RESOLVED Resolution|

http://bugzilla.mindrot.org/show_bug.cgi?id=112 Summary: Using host key fingerprint instead of "yes" Product: Portable OpenSSH Version: -current Platform: All OS/Version: All Status: NEW Severity: enhancement Priority: P2 Component: ssh AssignedTo: openssh-unix-dev at mindrot.org

http://bugzilla.mindrot.org/show_bug.cgi?id=112 markus at openbsd.org changed: What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Resolution| |WONTFIX ------- Additional Comments From markus at openbsd.org 2003-01-26

From: Colin Ian King <colin.king at canonical.com> [ Upstream commit b1d03fc36ec9834465a08c275c8d563e07f6f6bf ] Currently the uninitialized values in the array reply are printed out when exec is false and nvkm_pmu_send has not updated the array. Avoid confusion by only dumping out these values if they have been actually updated. Detected by CoverityScan, CID#1271291 ("Uninitialized

>Your CentOS Wiki home page [1] was created for you over three years >ago (2013-02-26 21:03:39) and you last edited it the next day >(2013-02-27 11:19:12). >I am unsure as to what you believe you need to do. <Puzzled!> >Alan. I'm sorry about that, I forgot I had it already! I was somewhat confused because despite logging in at accounts.centos.org I was presented with