Returns a subset of a LoCoH-xy object based on the id, ptid, idx, or dates

1 2 |

`lxy` |
A LoCoH-xy object |

`id` |
The id value(s) to include in the subset |

`ptid` |
A vector of ptid values for the subset of points |

`idx` |
A vector of indices for the subset of points |

`dt.start` |
A starting date for the subset. POSIXct object (or something that can be coered to POSIXct) |

`dt.end` |
An ending date for the subset. POSIXct object (or something that can be coered to POSIXct) |

`dt.int.round.to` |
The proportion of the median sampling frequency that time intervals will be rounded to when computing the frequency table of sampling intervals (no change is made to the time stamps) |

`tau.diff.max` |
The maximum deviation from tau (expressed as a proportion of tau) that a point-to-point time difference must fall within for the point-to-point distance to be included in the calculation of the median step length |

A LoCoH-xy object

`xyt.lxy`

, `lxy.repair`

, `lxy.thin.byfreq`

, `lxy.thin.bursts`

, `lxy.merge`

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