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

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)