turtles to their neighboring patch with the lowest value.
downhill(world, pVar, turtles, nNeighbors, torus = FALSE) # S4 method for worldMatrix,missing,agentMatrix,numeric downhill(world, turtles, nNeighbors, torus) # S4 method for worldArray,character,agentMatrix,numeric downhill(world, pVar, turtles, nNeighbors, torus = FALSE)
WorldMatrix or worldArray object.
Character. If the
AgentMatrix object representing the moving agents.
Integer: 4 or 8. Represents the number of neighbor patches considered.
Logical to determine if the
AgentMatrix representing the
turtles with updated
coordinates and updated data for their "heading" values and
previous coordinates "prevX"
If no neighboring patch has a smaller value than the patch where the turtle is currently located on, the turtle stays on this patch. It still moves to the patch center if it was not already on it.
If there are multiple neighboring patches with the same lowest value, the turtle chooses one patch randomly.
If a turtle is located on a patch on the edge
torus = FALSE, it has fewer
neighbouring patches as options to move than
torus = TRUE, the turtle can move on the other side of the
move downhill and its choice of neighbouring patches is always equals to
Wilensky, U. 1999. NetLogo. http://ccl.northwestern.edu/netlogo/. Center for Connected Learning and Computer-Based Modeling, Northwestern University. Evanston, IL.
w1 <- createWorld(minPxcor = 1, maxPxcor = 10, minPycor = 1, maxPycor = 10, data = runif(100)) t1 <- createTurtles(n = 10, coords = randomXYcor(w1, n = 10)) plot(w1)points(t1, col = of(agents = t1, var = "color"), pch = 16)t1 <- downhill(world = w1, turtles = t1, nNeighbors = 8) points(t1, col = of(agents = t1, var = "color"), pch = 16)