Database

Module for the snapshots database collected during the Offline stage.

Database	Database class
Database.__getitem__	This method returns a new Database with the selected parameters and snapshots.
Database.__len__	This method returns the number of snapshots.
Database.add	Add (by row) new sets of snapshots and parameters to the original database.

class Database(parameters=None, snapshots=None, space=None)

Bases: object

Database class

Parameters:

• parameters (array_like) – the input parameters

• snapshots (array_like) – the input snapshots

• scaler_parameters (Scale) – the scaler for the parameters. Default is None meaning no scaling.

• scaler_snapshots (Scale) – the scaler for the snapshots. Default is None meaning no scaling.

• space (array_like) – the input spatial data

add(parameter, snapshot)

Add (by row) new sets of snapshots and parameters to the original database.

Parameters:

• parameter (Parameter) – the parameter to add.

• snapshot (Snapshot) – the snapshot to add.

get_snapshot_space(index)

Get the space coordinates of a snapshot by its index.

Parameters:

index (int) – The index of the snapshot.

Returns:

The space coordinates of the snapshot.

Return type:

numpy.ndarray

property parameters_matrix

The matrix containing the input parameters (by row).

Return type:

numpy.ndarray

property snapshots_matrix

The matrix containing the snapshots (by row).

Return type:

numpy.ndarray

split(chunks, seed=None)

>>> db = Database(...)
>>> train, test = db.split([0.8, 0.2]) # ratio
>>> train, test = db.split([80, 20])   # n snapshots