methods.rhohat

0th

Percentile

Methods for Intensity Functions of Spatial Covariate

These are methods for the class "rhohat".

Keywords
methods, spatial
Usage
## S3 method for class 'rhohat':
print(x, ...)
## S3 method for class 'rhohat':
plot(x, ..., do.rug=TRUE)
## S3 method for class 'rhohat':
predict(object, ..., relative=FALSE)
Arguments
x,object
An object of class "rhohat" representing a smoothed estimate of the intensity function of a point process.
...
Arguments passed to other methods.
do.rug
Logical value indicating whether to plot the observed values of the covariate as a rug plot along the horizontal axis.
relative
Logical value indicating whether to compute the estimated point process intensity (relative=FALSE) or the relative risk (relative=TRUE) in the case of a relative risk estimate.
Details

These functions are methods for the generic commands print, plot and predict for the class "rhohat".

An object of class "rhohat" is an estimate of the intensity of a point process, as a function of a given spatial covariate. See rhohat. The method plot.rhohat displays the estimated function $\rho$ using plot.fv, and optionally adds a rug plot of the observed values of the covariate. The method predict.rhohat computes a pixel image of the intensity $\rho(Z(u))$ at each spatial location $u$, where $Z$ is the spatial covariate.

Value

  • For predict.rhohat the value is a pixel image (object of class "im"). For other functions, the value is NULL.

See Also

rhohat

Aliases
  • methods.rhohat
  • print.rhohat
  • plot.rhohat
  • predict.rhohat
Examples
X <-  rpoispp(function(x,y){exp(3+3*x)})
  rho <- rhohat(X, function(x,y){x})
  rho
  plot(rho)
  Y <- predict(rho)
  plot(Y)
  # 
  fit <- ppm(X, ~x)
  rho <- rhohat(fit, "y")
  opa <- par(mfrow=c(1,2))
  plot(predict(rho))
  plot(predict(rho, relative=TRUE))
  par(opa)
Documentation reproduced from package spatstat, version 1.36-0, License: GPL (>= 2)

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