| plot.owin {spatstat} | R Documentation |
Plot a two-dimensional window of observation for a spatial point pattern
## S3 method for class 'owin': plot(x, main, add=FALSE, ..., box, edge=0.04)
x |
The window to be plotted.
An object of class owin,
or data which can be converted into
this format by as.owin().
|
main |
text to be displayed as a title above the plot. |
add |
logical flag: if TRUE, draw the window in
the current plot; if FALSE, generate a new plot.
|
... |
extra arguments passed to the generic plot function.
|
box |
logical flag; if TRUE, plot the enclosing rectangular box
|
edge |
nonnegative number; the plotting region will have coordinate limits
that are 1 + edge
times as large as the limits of the rectangular box
that encloses the pattern.
|
This is the plot method for the class owin.
The action is to plot the boundary of the window on the current plot device,
using equal scales on the x and y axes.
If the window x is of type "rectangle" or "polygonal",
the boundary of the window is plotted as a polygon or series of polygons.
If x is of type "mask"
the discrete raster approximation of the window is displayed
as a binary image (white inside the window, black outside).
Graphical parameters controlling the display (e.g. setting the
colours) may be passed directly via the ... arguments,
or indirectly reset using
spatstat.options.
When x is of type "rectangle" or "polygonal",
it is plotted by the R function polygon. To control the
appearance (colour, fill density, line density etc) of the polygon
plot, determine the required argument of polygon
and pass it through ... For example, to draw the
polygon border in green, use the argument border="green".
When x is of type "mask", it is plotted by
image.default. The appearance of the image plot
can be controlled by passing arguments to image.default
through .... The default appearance can also be changed
by setting the parameter par.binary of spatstat.options.
none.
Adrian Baddeley adrian@maths.uwa.edu.au http://www.maths.uwa.edu.au/~adrian/ and Rolf Turner rolf@math.unb.ca http://www.math.unb.ca/~rolf
owin.object,
plot.ppp,
polygon,
image.default,
spatstat.options
## Not run: # rectangular window data(nztrees) plot(nztrees$window) abline(v=148, lty=2) # polygonal window plot(c(0,1),c(0,1),type="n") bdry <- locator() # click the vertices of a polygon (anticlockwise) w <- owin(c(0,1), c(0,1), poly=bdry) plot(w) # binary mask we <- erode.owin(w, 0.05, FALSE) plot(we) spatstat.options(par.binary=list(col=grey(c(0.5,1)))) plot(we) ## End(Not run)