Dear list,
I tried to find a solution for this problem from the archives but
couldn't find any. I would like sample sequence of ten days from
vector d
d <- seq(as.Date("2007-02-12"), as.Date("2008-08-18"),
by="days")
so that the days follow each other (sample(d, 10) is not the
appropriate solution). Any ideas?
Best regards,
Lauri
How about d[sample(length(d),10)] --- On Wed, 20/8/08, Lauri Nikkinen <lauri.nikkinen at iki.fi> wrote:> From: Lauri Nikkinen <lauri.nikkinen at iki.fi> > Subject: [R] Random sequence of days? > To: r-help at stat.math.ethz.ch > Received: Wednesday, 20 August, 2008, 4:04 PM > Dear list, > > I tried to find a solution for this problem from the > archives but > couldn't find any. I would like sample sequence of ten > days from > vector d > > d <- seq(as.Date("2007-02-12"), > as.Date("2008-08-18"), by="days") > > so that the days follow each other (sample(d, 10) is not > the > appropriate solution). Any ideas? > > Best regards, > Lauri > > ______________________________________________ > R-help at r-project.org mailing list > 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.
Lauri Nikkinen wrote:> Dear list, > > I tried to find a solution for this problem from the archives but > couldn't find any. I would like sample sequence of ten days from > vector d > > d <- seq(as.Date("2007-02-12"), as.Date("2008-08-18"), by="days") > > so that the days follow each other (sample(d, 10) is not the > appropriate solution). Any ideas?"Follow each other" is not clear to me. Do you want 10 consecutive days? (Pick a random day between the first and the last less ten, and then extract the consecutive days.) Do you want random days, but in sorted order? (sample ten days and sort the result.) -- --------------------------------------------------------------------------- Jeff Newmiller The ..... ..... Go Live... DCN:<jdnewmil at dcn.davis.ca.us> Basics: ##.#. ##.#. Live Go... Live: OO#.. Dead: OO#.. Playing Research Engineer (Solar/Batteries O.O#. #.O#. with /Software/Embedded Controllers) .OO#. .OO#. rocks...1k