Test Whether Object is a Hybrid
Tests where a point process model or point process interaction is a hybrid of several interactions.
## S3 method for class 'ppm': is.hybrid(x)
## S3 method for class 'interact': is.hybrid(x)
- A point process model (object of class
"ppm") or a point process interaction structure (object of class
A hybrid (Baddeley, Turner, Mateu and Bevan, 2012)
is a point process model created by combining two or more
point process models, or an interpoint interaction created by combining
two or more interpoint interactions.
is.hybrid is generic, with methods for
point process models (objects of class
and point process interactions
(objects of class
These functions return
TRUE if the object
x is a hybrid,
FALSE if it is not a hybrid.
TRUEif the object is a hybrid, and
Baddeley, A., Turner, R., Mateu, J. and Bevan, A. (2013)
Hybrids of Gibbs point process models and their implementation.
Journal of Statistical Software 55:11, 1--43.
S <- Strauss(0.1) is.hybrid(S) H <- Hybrid(Strauss(0.1), Geyer(0.2, 3)) is.hybrid(H) data(redwood) fit <- ppm(redwood, ~1, H) is.hybrid(fit)