Rotate the turtles
's headings to the left of angle
degrees.
left(turtles, angle) # S4 method for agentMatrix,numeric left(turtles, angle)
turtles 


angle  Numeric. Vector of angles in degrees by which to rotate the 
AgentMatrix
representing the turtles
with updated heading
values.
If a given angle
value is negative, then the turtle
rotates to the right.
Wilensky, U. 1999. NetLogo. http://ccl.northwestern.edu/netlogo/. Center for Connected Learning and ComputerBased Modeling, Northwestern University. Evanston, IL.
w1 < createWorld(minPxcor = 0, maxPxcor = 4, minPycor = 0, maxPycor = 4) t1 < createTurtles(n = 10, world = w1) of(agents = t1, var = "heading")#> [1] 2.796158 202.471384 219.078588 137.410553 149.028916 28.610072 #> [7] 238.699147 102.805717 250.756620 342.884828#> [1] 182.79616 22.47138 39.07859 317.41055 329.02892 208.61007 58.69915 #> [8] 282.80572 70.75662 162.88483