Certainly not a homework question. Elementary questions do not necessarily indicate that one is a student! Always learning...
Dr Conor Ryan On 28 September 2013 11:39, Patrick Burns <pbu...@pburns.seanet.com> wrote: > On 27/09/2013 21:01, Bert Gunter wrote: > >> On Fri, Sep 27, 2013 at 12:44 PM, Sarah Goslee <sarah.gos...@gmail.com> >> wrote: >> >>> It's a straightforward trigonometry problem, isn't it? >>> >> >> Indeed! ( (r,theta) to (x,y) coordinates ) . So I wonder if this is >> a homework problem. If so, the OP should note that we try not to do >> homework here. >> > > So that would make it unanimous that everyone here is trying > not to do homework. > > Pat > > > >> Cheers, >> Bert >> >>> >>> On Fri, Sep 27, 2013 at 2:56 PM, Conor Ryan <miol...@gmail.com> wrote: >>> >>>> I am trying to plot points on a map for each ship locations (lat/long), >>>> where >>>> each point is a line whose angle (degrees) denotes ships heading and >>>> whose >>>> line length denotes it's speed. Unfortunately arrows(); p.arrows >>>> (sfsmisc) >>>> and ms.arrows (TeachingDemos) require start and end coordinates but I >>>> only >>>> have a single coordinate and an angle to work with. Can you suggest any >>>> other packages or commands that might allow me to plot this? >>>> Alternatively, >>>> can anyone suggest a method of making 'angle' a vector quantity when >>>> using >>>> the arrows function? Any advice would be much appreciated! >>>> >>>> >>> -- >>> Sarah Goslee >>> http://www.**functionaldiversity.org<http://www.functionaldiversity.org> >>> >>> ______________________________**________________ >>> R-help@r-project.org mailing list >>> https://stat.ethz.ch/mailman/**listinfo/r-help<https://stat.ethz.ch/mailman/listinfo/r-help> >>> PLEASE do read the posting guide http://www.R-project.org/** >>> posting-guide.html <http://www.R-project.org/posting-guide.html> >>> and provide commented, minimal, self-contained, reproducible code. >>> >> >> >> >> > -- > Patrick Burns > pbu...@pburns.seanet.com > twitter: @burnsstat @portfolioprobe > http://www.portfolioprobe.com/**blog <http://www.portfolioprobe.com/blog> > http://www.burns-stat.com > (home of: > 'Impatient R' > 'The R Inferno' > 'Tao Te Programming') > > > ______________________________**________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/**listinfo/r-help<https://stat.ethz.ch/mailman/listinfo/r-help> > PLEASE do read the posting guide http://www.R-project.org/** > posting-guide.html <http://www.R-project.org/posting-guide.html> > and provide commented, minimal, self-contained, reproducible code. > [[alternative HTML version deleted]] ______________________________________________ R-help@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.
