[R-sig-Geo] Randomly moving a locality (within set limits)

[Alastair Potts]

Dear Frede, Barry and Don,

Thanks very for your thoughts!

Frede's function looks perfect! Thanks very much!!!

Barry, would not setting random U(-N,N) distance deal with the uniform
distance problem [i.e. distance <- runif(1,-15,15)].

Cheers,
Alastair




On 25 August 2014 10:48, Barry Rowlingson <b.rowlingson at lancaster.ac.uk>
wrote:

> > Now choose
> >
> > bearing <- runif(1, 0, 360)
> >
> > and
> >
> > distance <- runif(1, 0, 15)
> >
> > Please check the formulas against the homepage above.
>
>  Note: choosing a random bearing U(0,360) and a random U(0,N) distance
>  DOESNT generate a uniform distribution over the disk of radius N!
> You get more points near the centre!
>
>  Barry
>



-- 
Dr. Alastair J. Potts
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