TRUE if a turtle exists inside the
tExist(turtles, who, breed) # S4 method for agentMatrix,numeric,missing tExist(turtles, who) # S4 method for agentMatrix,numeric,character tExist(turtles, who, breed)
AgentMatrix object representing the moving agents.
Integer. Vector of the "who" numbers for the selected
Characters. Vector of "breed" names for the selected
Logical. Vector of
FALSE if the
with any of the
breed, if provided, exist or not
Wilensky, U. 1999. NetLogo. http://ccl.northwestern.edu/netlogo/. Center for Connected Learning and Computer-Based Modeling, Northwestern University. Evanston, IL.
w1 <- createWorld(minPxcor = 0, maxPxcor = 9, minPycor = 0, maxPycor = 9) t1 <- createTurtles(n = 10, coords = randomXYcor(w1, n = 10), breed = c(rep("sheep", 5), rep("wolf", 5))) tExist(turtles = t1, who = 3, breed = "sheep")#>  TRUEtExist(turtles = t1, who = 9, breed = "sheep")#>  FALSEtExist(turtles = t1, who = 9, breed = c("sheep", "wolf"))#>  TRUEtExist(turtles = t1, who = c(3, 9))#>  TRUE TRUE