haz.ppp | R Documentation |
ppp maker for the impatient layman
haz.ppp(W)
W |
a data frame or matrix with two or three columns (coordinate x, coordinate y, and mark of the point) |
This naive function easily transform your xy data to the format required by spatstat (version <2.0). It establishes the window of observation as the rectangle defined by the xy range. It asumes that the first two columns are coordinates x and y, and the third (if any) gives the marks of the points.
A point pattern with the format of spatstat v. < 2.0
This window is an underestimate of the real sampling window of the observed points. For a less biassed estimate, use function ripras
in spatstat.
Marcelino de la Cruz
ppp
, as.ppp
data(fig1) plot(fig1) #typical xyplot fig1.ppp <- haz.ppp (fig1) fig1.ppp plot(fig1.ppp) # point pattern plot of spatstat
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