lagx {DBfit} | R Documentation |

## Lag Functions

### Description

For preparing the transformed x and y in the Durbin stage 1 fit

### Usage

```
lagx(x, s1, s2)
lagmat(x, p)
```

### Arguments

`x` |
a vector or the design matrix, including intercept, i.e. the first column being ones. |

`s1` |
starting index of the slice. |

`s2` |
end index of the slice. |

`p` |
the order of autoregressive errors. |

### Note

These function are for internal use.

[Package

*DBfit*version 2.0 Index]