# Compaison QQ Plot

### Description

Produces side-by-side QQ plots. Aa optional simulated confidence envelope can be included in each plot.

### Usage

1 2 |

### Arguments

`x` |
an lmfm object. |

`fun` |
a function to extract the appropriate quantity from |

`envelope` |
a logical value. If |

`half.normal` |
a logical value. If |

`n.samples` |
a positive integer value giving the number of samples to compute in the simulation of the confidence envelope. |

`level` |
a numeric value between 0 and 1 specifying the confidence level for the envelope. |

`id.n` |
a non-negative integer value specifying the number of extreme points to identify. |

`qqline` |
a logical value. If |

`...` |
additional arguments are passed to |

### Value

the `trellis`

object is invisibly returned.