spatstat (version 1.17-1)

unmark: Remove Marks

Description

Remove the mark information from a spatial dataset.

Usage

unmark(X)
 ## S3 method for class 'ppp':
unmark(X)
 ## S3 method for class 'splitppp':
unmark(X)
 ## S3 method for class 'psp':
unmark(X)

Arguments

X

A point pattern (object of class "ppp"), a split point pattern (object of class "splitppp"), or a line segment pattern (object of class "psp").

Value

• An object of the same class as X with any mark information deleted.

Details

A `mark' is a value attached to each point in a spatial point pattern, or attached to each line segment in a line segment pattern, etc. The function unmark is a simple way to remove the marks from such a dataset.

See Also

ppp.object, psp.object

Examples

data(lansing)
  hicks <- lansing[lansing$marks == "hickory", ]
  plot(hicks)  # still a marked point pattern, but only 1 value of marks
  plot(unmark(hicks)) # unmarked