Extract.layered

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Extract Subset of a Layered Object

Extract some or all of the layers of a layered object, or extract a spatial subset of each layer.

Keywords
manip, spatial
Usage
## S3 method for class 'layered':
[(x, i, j, drop=FALSE, ...)
Arguments
x
A layered object (class "layered").
i
Subset index for the list of layers. A logical vector, integer vector or character vector specifying which layers are to be retained.
j
Subset index to be applied to the data in each layer. Typically a spatial window (class "owin").
drop
Logical. If i specifies only a single layer and drop=TRUE, then the contents of this layer will be returned.
...
Ignored.
Details

A layered object represents data that should be plotted in successive layers, for example, a background and a foreground. See layered.

This function extracts a designated subset of a layered object. It is a method for [ for the class "layered".

The index i specifies which layers will be retained. It should be a valid subset index for the list of layers.

The index j will be applied to each layer. It is typically a spatial window (class "owin") so that each of the layers will be restricted to the same spatial region. Alternatively j may be any subset index which is permissible for the "[" method for each of the layers.

Value

  • Usually an object of class "layered".

See Also

layered

Aliases
  • [.layered
Examples
example(layered)
 L[-2]
 L[, square(0.5)]
Documentation reproduced from package spatstat, version 1.37-0, License: GPL (>= 2)

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