caterva2.client.Dataset.slice

Dataset.slice(key: int | slice | Sequence[slice], as_blosc2: bool = True) → NDArray | SChunk | ndarray

Get a slice of a File/Dataset.

Parameters:

• key (int, slice, or sequence of slices) – The slice to retrieve. If a single slice is provided, it will be applied to the first dimension. If a sequence of slices is provided, each slice will be applied to the corresponding dimension.

• as_blosc2 (bool) – If True (default), the result will be returned as a Blosc2 object (either a SChunk or NDArray). If False, it will be returned as a NumPy array (equivalent to self[key]).

Returns:

A new Blosc2 object containing the requested slice.

Return type:

NDArray or SChunk or numpy.ndarray

Examples

>>> import caterva2 as cat2
>>> client = cat2.Client('https://demo.caterva2.net')
>>> root = client.get('example')
>>> ds = root['ds-1d.b2nd']
>>> ds.slice(1)
<blosc2.ndarray.NDArray object at 0x10747efd0>
>>> ds.slice(1)[()]
array(1)
>>> ds.slice(slice(0, 10))[:]
array([0, 1, 2, 3, 4, 5, 6, 7, 8, 9])