labcon | R Documentation |
This function attributes unique labels to pixels belonging to connected
features on a map of class SpatialPixelsDataFrame
.
labcon(x)
x |
an object of class |
Returns a matrix of class asc
, of type "factor"
, with a
number of levels equals to the number of connected components
Clement Calenge clement.calenge@ofb.gouv.fr
SpatialPixelsDataFrame-class
for further
information on the class SpatialPixelsDataFrame
data(lynxjura)
sa <- lynxjura$map[,1]
## build an image with separate components
sa[[1]][sa[[1]]<50] <- NA
## show the connected components
image(sa)
image(labcon(sa))
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