(sw-mirror)=

# sw_mirror

## Syntax
  
`[~, M] = sw_mirror(n)`
  
`[Vp, M] = sw_mirror(n,V)`
 
## Description
  
[~, M] = sw_mirror(n) generates the transformation matrix corresponding
to a mirror plane perpendicular to `n`.
 
`[Vp, M] = sw_mirror(n,V)` mirrors the vectors in `V`.  
  
To mirror any column vector use the following:
 
```matlab
Vp = M * V
```
 
To apply mirror plane operation on tensors ($3\times 3$ matrices) use the
following command:
 
```matlab
Ap = M * A * M'
```
 
## Input Arguments
  
`n`
: 3D Row vector, normal to the mirror plane.
  
`V`
: Matrix of 3D vectors, dimensions are $[3\times N]$.
  
## Output Arguments
  
`Vp`
: Mirrored vectors in a matrix with dimensions of $[3\times N]$.
 
`mirM`
: Matrix of the mirror transformation, dimensions are $[3\times 3]$.
  
## See Also
  
[sw_rot](#sw-rot)