Return a area from polygon xy coordinates
area(xy)Arguments
- xy
a atrix or data frame of xy coordinates
Value
a vector of polygon area
Examples
xy<-data.frame(x=c(0,1,2,1),y=c(1,2,1,0))
plot(xy,type="b") ; polygon(xy)
area(xy)
#> [1] 2
Return a area from polygon xy coordinates
area(xy)a atrix or data frame of xy coordinates
a vector of polygon area
xy<-data.frame(x=c(0,1,2,1),y=c(1,2,1,0))
plot(xy,type="b") ; polygon(xy)
area(xy)
#> [1] 2