[R] Obtaining the Hessian for the last iteration of a BFGS in optimx

Hello, I am running a BFGS using optimx and would like to obtain the Hessian for the last iteration. How can I go about this? Thank you __ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help P

Re: [R] two problems

I an not aware of any function or package named qcomhd in base R or in the CRAN contributed packages, nor did it turn up when I went searching for it there, so your failure to access it seems unsurprising. Google does find some references to a Github package called WRS that supposedly contains

[R] two problems

Hi, list experts I am totally a new user of the R package. I just tried to use qcomhd, but it gives me an error alarm, as below. qcomhd(RT1, RT2, q = seq(.1, .9, by=.1)) Error: could not find function "qcomhd" Then I try to install it, however, it seems that I am not able to install it. Also, in

Re: [R] more complex by with data.table???

Ramiro, `dt[, lapply(.SD, mean), by=name]` is the idiomatic way. I suggest reading through the new HTML vignettes at https://github.com/Rdatatable/data.table/wiki/Getting-started Ista, thanks for linking to the new vignette. On Wed, Jun 10, 2015 at 2:17 AM, Ista Zahn wrote: > Hi Ramiro, > > T

Re: [R] sorting a dataframe

Thank you all again. It works with : library("gtools") dat[mixedorder(A),] considering : A = c("A1","A10","A11","A2") B = c(1,2,3,4) dat = data.frame(A,B On Sun, Jun 21, 2015 at 10:52 AM, Bert Gunter wrote: > Diego: > > Nonsense! Look at the results of your code -- you have failed to order

Re: [R] sorting a dataframe

Diego: Nonsense! Look at the results of your code -- you have failed to order the results as had been requested by the OP. It's also unnecessarily complicated. The following suffices (where I have used regular expressions rather substring() to get the numeric part of the strings -- **assuming** th

Re: [R] sorting a dataframe

Bogdan, Follow my suggestion. letter <- substring(A, 1, 1) number <- substring(A, 2, nchar(A)) new.data <- paste0(letter, formatC(as.numeric(number), width = 2, flag = "0")) Em 20/06/2015 21:21, "Bogdan Tanasa" escreveu: > Dear all, > > I am looking for a suggestion please regarding sorting a d