search for: enricoschumann

...ed several candidate packages: https://cran.r-project.org/package=suntools https://cran.r-project.org/package=suncalc (but I don't use any of those packages) Perhaps also worth asking at: https://stat.ethz.ch/mailman/listinfo/R-SIG-Geo/ -- Enrico Schumann Lucerne, Switzerland http://enricoschumann.net

...tion of minimum-variance portfolios), and more. See the NEWS file [2] and the ChangeLog [3] for all details. Many of the new functions are described, with examples, in the Manual [4]. Kind regards Enrico [1] https://stat.ethz.ch/pipermail/r-packages/2016/001510.html [2] https://github.com/enricoschumann/NMOF/blob/master/NEWS [3] https://github.com/enricoschumann/NMOF/blob/master/ChangeLog [4] http://enricoschumann.net/NMOF.htm#NMOFmanual -- Enrico Schumann Lucerne, Switzerland http://enricoschumann.net

...nce claims) I will take a look at that page, thanks! Hopefully there is an R implementation of generic B&B as I described out there somewhere... Alex Byrley Graduate Student Department of Electrical Engineering 235 Davis Hall (716) 341-1802 2017-07-01 3:53 GMT-04:00 Enrico Schumann <es at enricoschumann.net>: > On Thu, 29 Jun 2017, Alex Byrley writes: > > > I am looking for packages that can run a branch-and-bound algorithm to > > maximize a distance measure (such as Bhattacharyya or Mahalanobis) on a > set > > of features. > > > > I would like this to be...

There is also the package solrad that might do some of this. It is more intended for calculating solar radiation, which is probably not what you want, but may do other things you may find helpful. > On Jan 30, 2024, at 5:44?AM, Enrico Schumann <es at enricoschumann.net> wrote: > > On Tue, 30 Jan 2024, Richard O'Keefe writes: > >> Given >> - UTC timestamp >> - a location (latitude,longitude,elevation) >> I want to know >> - the sun angles >> - the moon angles >> - the phase of the moon. >> I loo...

...rg/web/views/Optimization.html What you describe is a combinatorial problem: select k from N features, with k (much) smaller than N. So I'd suggest to also look at heuristic algorithms that can deal with such problems (e.g. genetic algorithms). -- Enrico Schumann Lucerne, Switzerland http://enricoschumann.net

Thanks a lot, so simple so efficient! I will study more the grep command I did not know. Thanks! Francesca Pancotto > Il giorno 19 ott 2017, alle ore 12:12, Enrico Schumann <es at enricoschumann.net> ha scritto: > > df[grep("strat", row.names(df)), ] [[alternative HTML version deleted]]

...ce Nexus repository. Seems a bit overkill > (given that wininet has done the trick nicely up to > now), but at least it works. > > HTH. > > \Gisbert There is also the miniCRAN package (https://cran.r-project.org/package=miniCRAN). -- Enrico Schumann Lucerne, Switzerland http://enricoschumann.net

I am looking for packages that can run a branch-and-bound algorithm to maximize a distance measure (such as Bhattacharyya or Mahalanobis) on a set of features. I would like this to be learning algorithm independent, so that the method just looks at the features, and selects the subset of a user-defined size that maximizes a distance criteria such as those stated above. Can anyone give some

..."match.length") ## [1] 7 ## attr(,"useBytes") ## [1] TRUE regexpr(".*[0-9]", test, perl = TRUE) ## [1] 7 ## attr(,"match.length") ## [1] 1 ## attr(,"useBytes") ## [1] TRUE -- Enrico Schumann Lucerne, Switzerland http://enricoschumann.net

...Investments LLC > W: 973.457.4602 > C: 551.655.8006 > The patched build (i.e. a complete version, not just the patch) is available from the same CRAN site at which you find the official release; just further below. > -----Original Message----- > From: Enrico Schumann [mailto:es at enricoschumann.net] > Sent: Friday, February 02, 2018 10:36 AM > To: Michael Ashton > Cc: Duncan Murdoch; r-help at r-project.org > Subject: Re: [R] command line fails > > > Quoting Michael Ashton <m.ashton at enduringinvestments.com>: > >> Fascinating. The script runs fine in...

...g mailing list -- To UNSUBSCRIBE and more, see > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. -- Enrico Schumann Lucerne, Switzerland http://enricoschumann.net

Dear All, My query is: Do we always need to use perl = TRUE option when doing ignore.case=TRUE? A small example : my_text = "RECOVERY OFFICER-II\nDEBTS RECOVERY TRIBUNAL-III\n RC No. 162/2015\nSBI VS RAMESH GUPTA.\n Dated: 01.03.2016 Item no.01\n Present: Ms. Sonakshi, the proxy counsel for Ms. Usha Singh, the counsel for ARCIL.\n None for the CDs.\n

...ave.Rnw (./src/library/utils/vignettes/Sweave.Rnw), it reads for literate programming \cite{fla:Knuth:1984}. but probably should be for literate programming \citep{fla:Knuth:1984}. ^ kind regards Enrico -- Enrico Schumann Lucerne, Switzerland http://enricoschumann.net

If Emacs is not asking for starting directory, it is very likely your init file has this somewhere: (setq ess-ask-for-ess-directory nil) On Mon, Sep 11, 2017 at 3:23 PM, Enrico Schumann <es at enricoschumann.net> wrote: > On Mon, 11 Sep 2017, Christian writes: > >> Hi, >> >> I experienced a sudden change in the behavior of M-x R in not giving >> me the choice where to start R. May be that I botched my >> preferences. I am using Aquamacs 3.3 on MacOS 10.12.6 >&g...

...alues. > > Thanks for any help you can provide. > > ---------------------------------- > Francesca Pancotto, PhD > Use ?grep or ?grepl: df[grep("strat", row.names(df)), ] (in which 'df' is your data frame) -- Enrico Schumann Lucerne, Switzerland http://enricoschumann.net

...PDT, Francesca PANCOTTO <f.pancotto at unimore.it> wrote: >Thanks a lot, so simple so efficient! > >I will study more the grep command I did not know. > >Thanks! > > >Francesca Pancotto > >> Il giorno 19 ott 2017, alle ore 12:12, Enrico Schumann ><es at enricoschumann.net> ha scritto: >> >> df[grep("strat", row.names(df)), ] > > > [[alternative HTML version deleted]] > >______________________________________________ >R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see >https://stat.ethz.ch/mailman/...

Dear R contributors, I have a problem in selecting in an efficient way, rows of a data frame according to a condition, which is a part of a row name of the table. The data frame is made of 64 rows and 2 columns, but the row names are very long but I need to select them according to a small part of it and perform calculations on the subsets. This is the example: X Y "Unique to

Hi, As I can see via path.expand a filename which contains a tilde anywhere gets automatically crippled. +> path.expand("a ~ b") [1] "a /home/user b" +> path.expand("a ~ b ~") [1] "a /home/user b /home/user" I want to open a file regardless whether its name contains any character unless 0. The unix filesystem allow the creation of such files, it

Hi, As I can see via path.expand a filename which contains a tilde anywhere gets automatically crippled. +> path.expand("a ~ b") [1] "a /home/user b" +> path.expand("a ~ b ~") [1] "a /home/user b /home/user" I want to open a file regardless whether its name contains any character unless 0. The unix filesystem allow the creation of such files, it

I have a humongous csv file containing census data, far too big to read into RAM. I have been trying to extract individual columns from this file using the colbycol package. This works for certain subsets of the columns, but not for others. I have not yet been able to precisely identify the problem columns, as there are 731 columns and running colbycol on the file on my old slow machine takes