It's a straightforward trigonometry problem, isn't it? 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! >
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