ppp.object {spatstat} | R Documentation |
A class "ppp"
to represent a two-dimensional point
pattern. Includes information about the window in which the
pattern was observed. Optionally includes marks.
This class represents a two-dimensional point pattern dataset. It specifies
The internal representation of marks is likely to change in the next release of this package.
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
library(spatstat) x <- runif(100) y <- runif(100) X <- ppp(x, y, c(0,1),c(0,1)) X plot(X) mar <- sample(1:3, 100, replace=TRUE) mm <- ppp(x, y, c(0,1), c(0,1), marks=mar) plot(mm) # points with mark equal to 2 ss <- mm[ mm$marks == 2 , ] plot(ss) # left half of pattern 'mm' lu <- owin(c(0,0.5),c(0,1)) mmleft <- mm[ , lu] plot(mmleft) # input data from file qq <- scanpp("my.table", unit.square()) # interactively build a point pattern plot(unit.square()) X <- as.ppp(locator(10), unit.square()) plot(X)