Report an empty turtle agentset.
noTurtles()AgentMatrix with the turtle variables defined as when using
createTurtles() but with 0 turtle.
Wilensky, U. 1999. NetLogo. http://ccl.northwestern.edu/netlogo/. Center for Connected Learning and Computer-Based Modeling, Northwestern University. Evanston, IL.
t1 <- noTurtles()
NLcount(t1)
#> [1] 0