Return circumference length of polygon line
circumference(l.)Arguments
- l.
data frame of line coordinates (x,y)
Value
a numeric of circumference length of polygon line
Examples
l. <- data.frame(x=c(0,0,1,1),y=c(0,1,1,0))
plot(l.,type="b") ; polygon(l.)
circumference(l.)
#> [1] 4