vechs {OpenMx} | R Documentation |

## Strict Half-vectorization

### Description

This function returns the strict half-vectorization of an input matrix as a column vector.

### Usage

```
vechs(x)
```

### Arguments

`x` |
an input matrix. |

### Details

The half-vectorization of an input matrix consists of the elements in the lower triangle of the matrix, excluding the elements along the diagonal of the matrix, as a column vector. The column vector is created by traversing the matrix in column-major order.

### See Also

### Examples

```
vechs(matrix(1:9, 3, 3))
vechs(matrix(1:12, 3, 4))
```

[Package

*OpenMx*version 2.21.11 Index]