### Syntax

`basisVec = basisvector(obj, {norm})`

### Description

`basisVec = basisvector(obj, {norm})`

returns the lattice vectors of the
unit cell in a \([3\times 3]\) matrix, with the \(a\), \(b\) and \(c\) vectors
stored in columns. The vectors are normalized to the lattice parameters
by default.

### Examples

The `basisVec`

matrix can be used to change coordinate system, converting
between positions expressed in lattice units to positions expressed in
Å, using `r_lu`

for lattice unit coordinates and `r_xyz`

for
Å units (both stored in a column vector) the conversions are the
following:

```
r_xyz = basisVec * r_lu
```

or

```
r_lu = inv(basisVec)*r_xyz
```

It is also possible to convert between momentum vector in reciprocal lattice units (rlu) into Å\(^{-1}\) units. Assuming that momentum vectors are row vectors:

```
Q_xyz = Q_rlu * 2*pi*inv(basisVec)
```

or

```
Q_rlu = 1/(2*pi)*Q_xyz*basisVect
```

### Input Arguments

`obj`

- spinw object.
`norm`

- If
`true`

, the basis vectors are normalized to 1, otherwise the length of the basis vectors are equal to the lattice constants. Default is`false`

.

### Output Arguments

`basisVec`

- Stores the three lattice vectors in columns, dimensions are \([3\times 3]\).