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] 349.19542 224.14516 162.05979 103.94759 80.60326 47.86232 109.89710 #> [8] 269.87545 157.68032 179.85000#> [1] 169.19542 44.14516 342.05979 283.94759 260.60326 227.86232 289.89710 #> [8] 89.87545 337.68032 359.85000