Create turtles

Create n moving agents with a set of defined variables.

createTurtles(n, coords, world, heading, breed, color)

# S4 method for numeric,matrix,missing
createTurtles(n, coords, world, heading, breed, color)

# S4 method for numeric,missing,ANY
createTurtles(n, coords, world, heading, breed, color)

Arguments

n

Integer.

coords

Matrix (ncol = 2) with the first column xcor and the second column ycor representing the turtles initial locations. nrow(coords) must be equal to 1 or to n. Given coordinates must be inside the world's extent. If missing, turtles are put in the center of the world.

world

WorldMatrix or worldArray object.

heading

Numeric. Vector of values between 0 and 360. Must be of length 1 or of length n. If missing, a random heading is assigned to each turtle.

breed

Character. Vector of breed names. Must be of length 1 or of length n. If missing, breed = "turtle" for all turtles.

color

Character. Vector of color names. Must be of length n. If missing, colors are assigned using the function rainbow(n).

Value

AgentMatrix object of length n with data for the turtles being: xcor, ycor, who, heading, prevX, prevY, breed, and color.

Details

If coords is provided, world must not be provided.

     The identity of the `turtles` is defined by their `who` number. This

     numbering starts at 0 and increments by 1.



     The coordinates from the previous time step are stored in `prevX` and

     `prevY`. The initial values are `NA`.

References

Wilensky, U. 1999. NetLogo. http://ccl.northwestern.edu/netlogo/. Center for Connected Learning and Computer-Based Modeling, Northwestern University. Evanston, IL.

See also

https://ccl.northwestern.edu/netlogo/docs/dictionary.html#create-turtles

Author

Sarah Bauduin

Examples

w1 <- createWorld(
  minPxcor = 0, maxPxcor = 4, minPycor = 0, maxPycor = 4,
  data = runif(25)
)
t1 <- createTurtles(n = 10, coords = randomXYcor(w1, n = 10))
plot(w1)
points(t1, col = of(agents = t1, var = "color"), pch = 16)