# Linearization of the ratio estimator

### Description

Computes linearized variable for the ratio estimator.

### Usage

1 | ```
lin.ratio(Y, Z, weight, Dom = NULL, percentratio = 1)
``` |

### Arguments

`Y` |
Matrix of numerator variables. Any object convertible to |

`Z` |
Matrix of denominator variables. Any object convertible to |

`weight` |
Weight variable. One dimensional object convertible to one-column |

`Dom` |
Optional variables used to define population domains. If supplied, the linearized variables are computed for each domain. An object convertible to |

`percentratio` |
Positive integer value. All linearized variables are multiplied with percentratio value, by default - 1. |

### Value

The function returns the `data.table`

of the linearized variables for the ratio estimator.

### References

Carl-Erik Sarndal, Bengt Swensson, Jan Wretman. Model Assisted Survey Sampling. Springer-Verlag, 1992, p.178.

### See Also

`domain`

,
`vardom`

,
`vardomh`

,
`vardcros`

,
`vardchanges`

,
`vardchangannual`

### Examples

1 2 3 4 5 6 7 |