
44 Spatial Point Patterns: Methodology and Applications with R
Figure 2.4. O bjects of class "owin" representing spatial wind ows. Left: rectangle; Middle: polyg-
onal regio n; Right: binary pixel mask.
The pixel values may be numeric (real or integer), logic a l, complex, char a cter, or factor values.
See Figure 2.5. I nformation on how to crea te an object of class "im" or to convert d ata stored in
some other way in to an object of this class is given in Section 3. 6.
Figure 2.5 . Ob je ct of class "im" representing a pixel image.
psp — spatial pattern of line segments:
A spatial pattern of line segments is rep resented by an
object ...