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kore
2017 Nov 09
0
R-help
...nerate x,y coordinates - ?expand.grid
sample n centers - ?sample
select all points within defined area - ?point.in.polygon, package sp
select desired number of points - ?sample
Cheers
Petr
> -----Original Message-----
> From: R-help [mailto:r-help-bounces at r-project.org] On Behalf Of john lukore
> Sent: Thursday, November 9, 2017 4:40 AM
> To: r-help at r-project.org
> Subject: [R] R-help
>
> Generate a clustered pattern in [0; 1]2 as follows:
>
> (a) Generate nc, say 20, independent cluster centres (which can be called
> parents) that are distributed i.i.d. uniform...
2017 Nov 09
2
R-help
Generate a clustered pattern in [0; 1]2 as follows:
(a) Generate nc, say 20, independent cluster centres (which can be called
parents) that are distributed i.i.d. uniformly in the unit square;
(b) then n daughters are assigned i.i.d. uniformly to these parents and
such that each daughter is located i.i.d. uniformly in a disk of radius r =
0:1 centred at her parent, under the periodic boundary