Tests whether a point pattern on a network has “marks” attached to the points which classify the points into several types.
## S3 method for class 'lpp' is.multitype(X, na.action="warn", ...)
Point pattern on a linear networl
(object of class
String indicating what to do if
“Marks” are observations attached to each point of a point pattern.
For example the
chicago dataset contains
the locations of crimes, each crime location
being marked by the type of crime.
This function tests whether the point pattern
contains or involves marked points, and that the
marks are a factor.
It is a method for the generic function
na.action determines what action will be taken
if the point pattern has a vector of marks but some or all of the
NA. Options are
"fatal" to cause a fatal
"warn" to issue a warning and then return
"ignore" to take no action except returning
Logical value, equal to
X is a multitype point pattern.
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