ddtw_alignment_path#
- ddtw_alignment_path(x: ndarray, y: ndarray, window: float = None) Tuple[List[Tuple[int, int]], float] [source]#
Compute the ddtw alignment path between two time series.
- Parameters:
- x: np.ndarray, of shape (n_channels, n_timepoints) or (n_timepoints,)
First time series.
- y: np.ndarray, of shape (m_channels, m_timepoints) or (m_timepoints,)
Second time series.
- window: float, default=None
The window to use for the bounding matrix. If None, no bounding matrix is used.
- Returns:
- List[Tuple[int, int]]
The alignment path between the two time series where each element is a tuple of the index in x and the index in y that have the best alignment according to the cost matrix.
- float
The ddtw distance betweeen the two time series.
- Raises:
- ValueError
If x and y are not 1D, or 2D arrays. If n_timepoints or m_timepoints are less than 2.
Examples
>>> import numpy as np >>> from aeon.distances import ddtw_alignment_path >>> x = np.array([[1, 2, 3, 6]]) >>> y = np.array([[1, 2, 3, 4]]) >>> ddtw_alignment_path(x, y) ([(0, 0), (1, 1)], 0.25)