extrapolate.psp | R Documentation |
Given a spatial pattern of line segments, extrapolate the segments to infinite lines.
extrapolate.psp(x, ...)
x |
Spatial pattern of line segments (object of class |
... |
Ignored. |
Each line segment in the pattern x
is
extrapolated to an infinite line, drawn through its two endpoints.
The resulting pattern of infinite lines
is returned as an object of class "infline"
.
If a segment's endpoints are identical
(so that it has zero length)
the resulting infinite line is vertical (i.e. parallel to the y
coordinate axis).
An object of class "infline"
representing the pattern of
infinite lines. See infline
for details of
structure.
.
psp
,
infline
midpoints.psp
,
lengths_psp
angles.psp
,
endpoints.psp
.
X <- psp(runif(4), runif(4), runif(4), runif(4), window=owin())
Y <- extrapolate.psp(X)
plot(X, col=3, lwd=4)
plot(Y, lty=3)
Y
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