# Compress replicate weight matrix

### Description

Many replicate weight matrices have redundant rows, such as when
weights are the same for all observations in a PSU. This function
produces a compressed form. Methods for `as.matrix`

and
`as.vector`

extract and expand the weights.

### Usage

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### Arguments

`rw` |
A set of replicate weights or a |

`x` |
A compressed set of replicate weights |

`...` |
For future expansion |

### Value

An object of class `repweights_compressed`

or a
`svyrep.design`

object with `repweights`

element of class `repweights_compressed`

### See Also

`jknweights`

,`as.svrepdesign`

### Examples

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