Resample

class torch_ecg._preprocessors.Resample(fs: int | None = None, siglen: int | None = None, **kwargs: Any)[source]

Bases: PreProcessor

Resample the signal into fixed sampling frequency or length.

Parameters:

  • fs (int, optional) – Sampling frequency of the resampled ECG.

  • siglen (int, optional) – Number of samples in the resampled ECG.

Note

One and only one of fs and siglen should be set.

Examples

from torch_ecg.cfg import DEFAULTS
sig = DEFAULTS.RNG.randn(1000)
pp = Resample(fs=500)
sig, _ = pp(sig, 250)
apply(sig: ndarray, fs: Real) → Tuple[ndarray, int][source]

Apply the preprocessor to sig.

Parameters:

  • sig (numpy.ndarray) –

    The ECG signal, can be

    • 1d array, which is a single-lead ECG;

    • 2d array, which is a multi-lead ECG of “lead_first” format;

    • 3d array, which is a tensor of several ECGs, of shape (batch, lead, siglen).

  • fs (numbers.Real) – Sampling frequency of the ECG signal.

Returns:

  • rsmp_sig (numpy.ndarray) – The resampled ECG signal.

  • new_fs (int,) – Sampling frequency of the resampled ECG signal.

extra_repr_keys() → List[str][source]

Extra keys for __repr__() and __str__().