# grow.rectangle

0th

Percentile

Adds a margin to a rectangle.

Keywords
manip, spatial
##### Usage
grow.rectangle(W, xmargin=0, ymargin=xmargin, fraction=NULL)
##### Arguments
W

A window (object of class "owin"). Must be of type "rectangle".

xmargin

Width of horizontal margin to be added. A single nonnegative number, or a vector of length 2 indicating margins of unequal width at left and right.

ymargin

Height of vertical margin to be added. A single nonnegative number, or a vector of length 2 indicating margins of unequal width at bottom and top.

fraction

Fraction of width and height to be added. A number greater than zero, or a numeric vector of length 2 indicating different fractions of width and of height, respectively. Incompatible with specifying xmargin and ymargin.

##### Details

This is a simple convenience function to add a margin of specified width and height on each side of a rectangular window. Unequal margins can also be added.

##### Value

Another object of class "owin" representing the window after margins are added.

trim.rectangle, dilation, erosion, owin.object

##### Aliases
• grow.rectangle
##### Examples
# NOT RUN {
w <- square(10)
# add a margin of width 1 on all four sides
square12 <- grow.rectangle(w, 1)

# add margin of width 3 on the right side
# and margin of height 4 on top.
v <- grow.rectangle(w, c(0,3), c(0,4))

# grow by 5 percent on all sides
grow.rectangle(w, fraction=0.05)
# }

Documentation reproduced from package spatstat, version 1.59-0, License: GPL (>= 2)

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