patchLeft: 'Patches' on the left

In NetLogoR: Build and Run Spatially Explicit Agent-Based Models

Patches on the left

Description

Report the coordinates of the patches at the given distances of the turtles and given angle left of their headings.

Usage

patchLeft(world, turtles, dist, angle, torus = FALSE)

## S4 method for signature 'worldNLR,agentMatrix,numeric,numeric'
patchLeft(world, turtles, dist, angle, torus = FALSE)

Arguments

world	WorldMatrix or worldArray object.
turtles	AgentMatrix object representing the moving agents.
dist	Numeric. Vector of distances from the turtles. dist must be of length 1 or of length turtles.
angle	Numeric. Vector of angles in degrees by which the turtle's headings should rotate to locate the patches. Must be of length 1 or of length turtles.
torus	Logical to determine if the world is wrapped. Default is torus = FALSE.

Details

If a given dist value is negative, then the turtle would look backward. If a given angle value is negative, then the turtle would look to the right.

     If `torus = FALSE` and the `patch` at distance `dist` of a `turtle`
     and `angle` degrees to the left of its `heading` is outside the
     `world`'s extent, `NA`
     are returned for the `patch` coordinates. If `torus = TRUE`, the `patch`
     coordinates from a wrapped `world` are returned.

Value

Matrix (ncol = 2) with the first column pxcor and the second column pycor representing the coordinates of the patches at dist distances of the turtles and angle to the left of their headings. The order of the patches follows the order of the turtles.

Author(s)

Sarah Bauduin

References

Wilensky, U. 1999. NetLogo. https://www.netlogo.org. Center for Connected Learning and Computer-Based Modeling, Northwestern University. Evanston, IL.

See Also

https://docs.netlogo.org/dictionary.html#patch-lr-and-ahead

Examples

w1 <- createWorld(minPxcor = 0, maxPxcor = 9, minPycor = 0, maxPycor = 9)
t1 <- createTurtles(n = 1, coords = cbind(xcor = 2, ycor = 2), heading = 90)
patchLeft(world = w1, turtles = t1, dist = 2, angle = 90)

NetLogoR documentation built on Sept. 9, 2025, 5:27 p.m.