Report `TRUE`

if a patch exists inside the `world`

's extent, report
`FALSE`

otherwise.

```
pExist(world, pxcor, pycor)
# S4 method for worldNLR,numeric,numeric
pExist(world, pxcor, pycor)
```

- world
`WorldMatrix`

or`worldArray`

object.- pxcor
Integer. Vector of patches

`pxcor`

coordinates. Must be of length 1 or of the same length as`pycor`

.- pycor
Integer. Vector of patches

`pycor`

coordinates. Must be of length 1 or of the same length as`pxcor`

.

Logical.

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

```
w1 <- createWorld(minPxcor = 0, maxPxcor = 9, minPycor = 0, maxPycor = 9)
pExist(world = w1, pxcor = -1, pycor = 2)
#> [1] FALSE
```