Hi everyone, I am trying to process a lot of points as ppp points, put I 
see that the ppp object cannot be created if the coordinate matrix has 
duplicated values. I have duplicates because the points are acutally 
from a 3D  laser scan survey so I will need duplicats. My code to figure 
my error was:
pts is the x,y matrix and i is the slice that I used to check when my 
error occured.

ppp(pts[1:i,1], pts[1:i,2], range(pts[1:i,1]), range(pts[1:i,2]))

Question is: is there a way to overcome this? My final objective is 
"simply" to use pixellate to aggregate statistics locally (ie average 
point density in a square meter grid or mean reflectance value of each 
point)

Cheers, and thanks for your time.
Francesco
-- 
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*Francesco Pirotti*
Dep. TESAF
CIRGEO -- Interdepartmental Research Center on Cartography Photogrammetry
Remote Sensing and G.I.S.
University of Padova
Web: http://www.cirgeo.unipd.it/cirgeo/francescopirotti.htm
Email: francesco.pirotti@unipd.it <mailto:francesco.pirotti@unipd.it>
Phone: +39 049 827 2710
Phone: +39 349 55 39 261
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