textureplot

From spatstat v1.56-1 by Adrian Baddeley

Plot Image or Tessellation Using Texture Fill

For a factor-valued pixel image, this command plots each level of the factor using a different texture. For a tessellation, each tile is plotted using a different texture.

Keywords: hplot, spatial

Usage

textureplot(x, …,
            main, add=FALSE, clipwin=NULL, do.plot = TRUE,
            border=NULL, col = NULL, lwd = NULL, lty = NULL, spacing = NULL,
            textures=1:8,
            legend=TRUE,
            leg.side=c("right", "left", "bottom", "top"),
            legsep=0.1, legwid=0.2)

Arguments

x: A tessellation (object of class "tess" or something acceptable to as.tess) with at most 8 tiles, or a pixel image (object of class "im" or something acceptable to as.im) whose pixel values are a factor with at most 8 levels.
…: Other arguments passed to add.texture.
main: Character string giving a main title for the plot.
add: Logical value indicating whether to draw on the current plot (add=TRUE) or to initialise a new plot (add=FALSE).
clipwin: Optional. A window (object of class "owin"). Only this subset of the image will be displayed.
do.plot: Logical. Whether to actually do the plot.
border: Colour for drawing the boundaries between the different regions. The default (border=NULL) means to use par("fg"). Use border=NA to omit borders.
col: Numeric value or vector giving the colour or colours in which the textures should be plotted.
lwd: Numeric value or vector giving the line width or widths to be used.
lty: Numeric value or vector giving the line type or types to be used.
spacing: Numeric value or vector giving the spacing parameter for the textures.
textures: Textures to be used for each level. Either a texture map (object of class "texturemap") or a vector of integer codes (to be interpreted by add.texture).
legend: Logical. Whether to display an explanatory legend.
leg.side: Position of legend relative to main plot.
legsep: Separation between legend and main plot, as a fraction of the shortest side length of the main plot.
legwid: Width (if vertical) or height (if horizontal) of the legend as a fraction of the shortest side length of the main plot.

Details

If x is a tessellation, then each tile of the tessellation is plotted and filled with a texture using add.texture.

If x is a factor-valued pixel image, then for each level of the factor, the algorithm finds the region where the image takes this value, and fills the region with a texture using add.texture.

Value

(Invisible) A texture map (object of class "texturemap") associating a texture with each level of the factor.

Examples

# NOT RUN {
  nd <- if(interactive()) 128 else 32
  Z <- setcov(owin(), dimyx=nd)
  Zcut <- cut(Z, 3, labels=c("Lo", "Med", "Hi"))
  textureplot(Zcut)
  textureplot(dirichlet(runifpoint(6)))
# }

Documentation reproduced from package spatstat, version 1.56-1, License: GPL (>= 2)

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