spatstat.linnet (version 3.2-2)

Replace.linim: Reset Values in Subset of Image on Linear Network

Description

Reset the values in a subset of a pixel image on a linear network.

Usage

# S3 method for linim
[(x, i, j) <- value

Value

The image x with the values replaced.

Arguments

x

A pixel image on a linear network. An object of class "linim".

i

Object defining the subregion or subset to be replaced. Either a spatial window (an object of class "owin"), or a pixel image with logical values, or a point pattern (an object of class "ppp"), or any type of index that applies to a matrix, or something that can be converted to a point pattern by as.ppp (using the window of x).

j

An integer or logical vector serving as the column index if matrix indexing is being used. Ignored if i is appropriate to some sort of replacement other than matrix indexing.

value

Vector, matrix, factor or pixel image containing the replacement values. Short vectors will be recycled.

Author

Adrian Baddeley , Rolf Turner and Ege Rubak .

Details

This function changes some of the pixel values in a pixel image. The image x must be an object of class "linim" representing a pixel image on a linear network.

The pixel values are replaced according to the rules described in the help for [<-.im. Then the auxiliary data are updated.

See Also

[<-.im.

Examples

  # make a function
  Y <- as.linim(distfun(runiflpp(5, simplenet)))
  # replace some values
  B <- square(c(0.25, 0.55))
  Y[B] <- 2
  plot(Y, main="")
  plot(B, add=TRUE, lty=3)
  X <- runiflpp(4, simplenet)
  Y[X] <- 5