rectcontact

0th

Percentile

Contact Distribution Function using Rectangular Structuring Element

Computes an estimate of the contact distribution function of a set, using a rectangular structuring element.

Keywords
spatial, nonparametric
Usage
rectcontact(X, …, asp = 1, npasses=4,
eps = NULL, r = NULL, breaks = NULL, correction = c("rs", "km"))
Arguments
X

Logical-valued image. The TRUE values in the image determine the spatial region whose contact distribution function should be estimated.

Ignored.

asp

Aspect ratio for the rectangular metric. A single positive number. See rectdistmap for explanation.

npasses

Number of passes to perform in the distance algorithm. A positive integer. See rectdistmap for explanation.

eps

Pixel size, if the image should be converted to a finer grid.

r

Optional vector of distance values. Do Not Use This.

breaks

Do Not Use This.

correction

Character vector specifying the edge correction.

To be written.

Value

Object of class "fv".

Hest

• rectcontact
Examples
# NOT RUN {
## make an image which is TRUE/FALSE inside/outside the letter R
V <- letterR
Frame(V) <- grow.rectangle(Frame(V), 0.5)
Z <- as.im(V, value=TRUE, na.replace=FALSE)
## analyse
plot(rectcontact(Z))
# }

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

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