pymove.query package

Submodules

pymove.query.query module

Query operations.

range_query, knn_query

pymove.query.query.knn_query(traj: pandas.core.frame.DataFrame, move_df: pandas.core.frame.DataFrame, k: int = 5, id_: str = 'id', distance: str = 'MEDP', latitude: str = 'lat', longitude: str = 'lon', datetime: str = 'datetime') → pandas.core.frame.DataFrame[source]

Returns the k neighboring trajectories closest to the trajectory.

Given a k, a trajectory and a DataFrame with multiple paths.

Parameters:
  • traj (dataframe) – The input of one trajectory.
  • move_df (dataframe) – The input trajectory data.
  • k (int, optional) – neighboring trajectories, by default 5
  • id (str, optional) – Label of the trajectories dataframe user id, by default TRAJ_ID
  • distance (string, optional) – Distance measure type, by default MEDP
  • latitude (string, optional) – Label of the trajectories dataframe referring to the latitude, by default LATITUDE
  • longitude (string, optional) – Label of the trajectories dataframe referring to the longitude, by default LONGITUDE
  • datetime (string, optional) – Label of the trajectories dataframe referring to the timestamp, by default DATETIME
Returns:

dataframe with near trajectories
Return type:

DataFrame
Raises:

ValueError: if distance measure is invalid
pymove.query.query.range_query(traj: pandas.core.frame.DataFrame, move_df: pandas.core.frame.DataFrame, _id: str = 'id', min_dist: float = 1000, distance: str = 'MEDP', latitude: str = 'lat', longitude: str = 'lon', datetime: str = 'datetime') → pandas.core.frame.DataFrame[source]

Returns all trajectories that have a distance equal to or less than the trajectory.

Given a distance, a trajectory, and a DataFrame with several trajectories.

Parameters:
  • traj (dataframe) – The input of one trajectory.
  • move_df (dataframe) – The input trajectory data.
  • _id (str, optional) – Label of the trajectories dataframe user id, by default TRAJ_ID
  • min_dist (float, optional) – Minimum distance measure, by default 1000
  • distance (string, optional) – Distance measure type, by default MEDP
  • latitude (string, optional) – Label of the trajectories dataframe referring to the latitude, by default LATITUDE
  • longitude (string, optional) – Label of the trajectories dataframe referring to the longitude, by default LONGITUDE
  • datetime (string, optional) – Label of the trajectories dataframe referring to the timestamp, by default DATETIME
Returns:

dataframe with near trajectories
Return type:

DataFrame
Raises:

ValueError: if distance measure is invalid

Module contents

Contains functions to perform queries on trajectories.

query