A fitted point process model, typically obtained from
the model-fittingg algorithm ppm.
An object of class "ppm".
Character vector (partially-matched) indicating what information
should be printed.
This is the print method for the class "ppm".
It prints information about the fitted model in a sensible format.
The argument what makes it possible to print only some
of the information.
If what is missing, then by default,
standard errors for the estimated coefficients of the model
will be printed only if the model is a Poisson point process.
To print the standard errors for a non-Poisson model,
call print.ppm with the argument what given explicitly,
or reset the default rule by typing