spatstat.core (version 2.3-0)

intensity.slrm: Intensity of Fitted Spatial Logistic Regression Model

Description

Computes the intensity of a fitted spatial logistic regression model, treated as a point process model.

Usage

# S3 method for slrm
intensity(X, …)

Arguments

X

A fitted spatial logistic regression model (object of class "slrm").

…

Arguments passed to predict.slrm in some cases. See Details.

Value

A numeric value (if the model is stationary) or a pixel image.

Details

This is a method for the generic function intensity for spatial logistic regression models (class "slrm").

The fitted spatial logistic regression model X is interpreted as a point process model. The intensity of a point process model is defined as the expected number of random points per unit area. The fitted probabilities of presence according to X are converted to intensity values.

The result is a numerical value if X is stationary, and a pixel image if X is non-stationary. In the latter case, the resolution of the pixel image is controlled by the arguments … which are passed to predict.slrm.

References

Baddeley, A., Berman, M., Fisher, N.I., Hardegen, A., Milne, R.K., Schuhmacher, D., Shah, R. and Turner, R. (2010) Spatial logistic regression and change-of-support for spatial Poisson point processes. Electronic Journal of Statistics 4, 1151--1201. doi: 10.1214/10-EJS581

See Also

intensity, intensity.ppm

Examples

# NOT RUN {
  fitS <- slrm(swedishpines ~ 1)
  intensity(fitS)
  fitX <- slrm(swedishpines ~ x)
  intensity(fitX)
# }