Move the turtles
backward of their headings' directions.
bk(turtles, dist, world, torus = FALSE, out = TRUE) # S4 method for agentMatrix,numeric bk(turtles, dist, world, torus = FALSE, out = TRUE)
turtles 


dist  Numeric. Vector of distances to move. Must
be of length 1 or of length 
world 

torus  Logical to determine if the 
out  Logical. Determine if a 
AgentMatrix
representing the turtles
with updated
coordinates and updated data for their previous coordinates prevX
and prevY
.
If torus = FALSE
and out = TRUE
, world
does not need to be provided.
If a distance to move leads a turtle
outside of the world
's extent
and torus = TRUE
, the turtle
is
relocated on the other side of the world
, inside its extent; if
torus = FALSE
and out = TRUE
, the turtle
moves past the
world
's extent; if torus = FALSE
and out = FALSE
, the
turtle
does not move at all. In the event that a turtle
does not move,
its previous coordinates are still updated with its position before
running bk()
(i.e., its current position).
If a given dist
value is negative, then the turtle
moves
forward.
The turtles
' headings are not affected by the function (i.e., the
turtles
do not face backward).
Wilensky, U. 1999. NetLogo. http://ccl.northwestern.edu/netlogo/. Center for Connected Learning and ComputerBased Modeling, Northwestern University. Evanston, IL.
https://ccl.northwestern.edu/netlogo/docs/dictionary.html#back
https://ccl.northwestern.edu/netlogo/docs/dictionary.html#jump
Sarah Bauduin
w1 < createWorld(minPxcor = 0, maxPxcor = 4, minPycor = 0, maxPycor = 4, data = runif(25)) t1 < createOTurtles(n = 10, world = w1) plot(w1)