# neighbors

Triangle or tetrahedron neighbors

## Description

returns the IDs of the neighbors to all triangles or tetrahedra in
`N`

= neighbors(`TR`

)`TR`

. `N`

is a 3-column (2-D) or 4-column
(3-D) matrix whose rows contain the IDs of the neighboring triangles or tetrahedra
to that element in the triangulation.

## Examples

## Input Arguments

## Extended Capabilities

## Version History

**Introduced in R2013a**