Marks of a Line Segment Pattern
Extract or change the marks attached to a line segment pattern.
## S3 method for class 'psp' marks(x, ..., dfok=TRUE) ## S3 replacement method for class 'psp' marks(x, ...) <- value
x |
Line segment pattern dataset (object of class |
... |
Ignored. |
dfok |
Logical. If |
value |
Vector or data frame of mark values,
or |
The expression marks(x) extracts the marks of x.
The assignment marks(x) <- value assigns new marks to the
dataset x, and updates the dataset x in the current
environment.
The marks can be a vector, a factor, or a data frame.
For the assignment marks(x) <- value, the value
should be a vector or factor of length equal to the number of
segments in x, or a data frame with as many rows
as there are segments in x. If value is a single value,
or a data frame with one row, then it will be replicated
so that the same marks will be attached to each segment.
To remove marks, use marks(x) <- NULL or unmark(x).
For marks(x), the result is a vector, factor or data frame,
containing the mark values attached to the line segments of x.
If there are no marks, the result is NULL.
For marks(x) <- value, the result is the updated line segment pattern
x (with the side-effect that the dataset x is updated in
the current environment).
Adrian Baddeley Adrian.Baddeley@curtin.edu.au, Rolf Turner r.turner@auckland.ac.nz and Ege Rubak rubak@math.aau.dk.
m <- data.frame(A=1:10, B=letters[1:10]) X <- psp(runif(10), runif(10), runif(10), runif(10), window=owin(), marks=m) marks(X) marks(X)[,2] marks(X) <- 42 marks(X) <- NULL
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