
74 Spatial Point Patterns: Methodology and Applications with R
Additional c olumns can be added in the same way as for a da ta frame.
Hyperframes are covered in Chapte r 16, in particular Section 16.4. They appear a gain briefly in
Section 3.10.3.6 below.
3.9 Interactive data entry in spatstat
Spatial da ta can also be entered interactively, using a graphical point-and-click interface. The facil-
ities are listed in Table 3.3. They are rudimentary compared to other specialised graphics packages,
but th ey have the advantage that the data will immediately be entered in a spatstat data format.
The interface is robust and available on almost a ny computer ...