Hi Jose,
If you end up writing your own function for this sort of thing, I'd
advise you consider whether data.frames are the right data structure to
use -- since they have a very high speed penalty for row-wise operations
like what you are talking about. If all your attributes are of the same
Check out GRASS functionality
https://grasswiki.osgeo.org/wiki/LIDAR
which can be very efficient as nicely combined with R via
https://grasswiki.osgeo.org/wiki/R_statistics
Cheers,
Jan
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www.wageningenur.nl/changemonitor
On 31/08/15 10:43, "R-sig-Geo on behalf of Jose Tanago"
wrote:
