[R] How to label a polygon window (spatstat package)

[Mohammad Tanvir Ahamed]

Hi, 
I want to label a polygon (circle or polygon) inside.
As for example code 

library(spatstat)
x <- runif(20)
y <- runif(20)
X <- ppp(x, y, window=disc(0.7))
plot(X)

Now I want to label that circle inside . Can some one please help me ? 
Thanks. 

Regards.............
Tanvir Ahamed 
Stockholm, Sweden     |  mashranga at yahoo.com