# addFace

## Description

adds a new face to the geometry `h`

= addFace(`g`

,`edges`

)`g`

. The specified edges must form a
closed contour. For a 2-D geometry, adding a new face lets you fill voids in the geometry.
For a 3-D geometry, adding a new face lets you split one cell into multiple cells.

You can add several new faces simultaneously by specifying their contours in a cell array. Each contour in the cell array must be unique.

**Note**

After modifying a geometry, always call `generateMesh`

to ensure a
proper mesh association with the new geometry.

## Examples

## Input Arguments

## Output Arguments

## Tips

`addFace`

errors when the specified contour defines an already existing face.If the original geometry

`g`

is a`DiscreteGeometry`

or`AnalyticGeometry`

object,`addFace`

modifies the original geometry`g`

.If the original geometry

`g`

is an`fegeometry`

object, and you want to replace it with the modified geometry, assign the output to the original geometry, for example,`g = addFace(g,[1 3 4 7])`

.

## Version History

**Introduced in R2020a**

## See Also

### Functions

`addVertex`

|`pdegplot`

|`importGeometry`

|`geometryFromMesh`

|`generateMesh`

|`mergeCells`

|`structuralBoundaryLoad`

|`structuralBC`