Converts data specifying a tessellation,
in any of several formats, into an object of class "tess".
# S3 method for quadrattest
as.tess(X)An object of class "tess" specifying a tessellation.
Data to be converted to a tessellation.
Adrian Baddeley Adrian.Baddeley@curtin.edu.au and Rolf Turner r.turner@auckland.ac.nz
A tessellation is a collection of disjoint spatial regions
(called tiles) that fit together to form a larger spatial
region. This command creates an object of class "tess" that
represents a tessellation.
This function converts data in any of several formats
into an object of class "tess" for use by the spatstat
package. The argument X may be
an object of class "tess".
The object will be stripped of any extraneous attributes
and returned.
a pixel image (object of class "im") with pixel values that
are logical or factor values. Each level of the factor will
determine a tile of the tessellation.
a window (object of class "owin"). The result will be a
tessellation consisting of a single tile.
a set of quadrat counts (object of class "quadratcount")
returned by the command quadratcount.
The quadrats
used to generate the counts will be extracted and returned as a
tessellation.
a quadrat test (object of class "quadrattest")
returned by the command quadrat.test.
The quadrats
used to perform the test will be extracted and returned as a
tessellation.
a list of windows (objects of class "owin")
giving the tiles of the tessellation.
The function as.tess is generic, with methods for
various classes, as listed above.
tess
h <- quadrat.test(nztrees, nx=4, ny=3)
as.tess(h)
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