liana.utils.neg_to_zero

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liana.utils.neg_to_zero#

liana.utils.neg_to_zero(X, cutoff=0)#

Set negative values to 0.

Parameters:

  • X (Union[Buffer, _SupportsArray[dtype[Any]], _NestedSequence[_SupportsArray[dtype[Any]]], complex, bytes, str, _NestedSequence[complex | bytes | str]]) – Data to be transformed.

  • cutoff (float (default: 0)) – Cutoff value for zero-inflation - values less than this are set to 0. Default is 0.

Return type:

csr_matrix

Returns:

The modified data matrix

Examples

>>> import numpy as np
>>> import liana as li
>>> x = np.array([-1, -0.5, 0.1, 0.4, 2])
>>> li.ut.neg_to_zero(x).toarray()
array([[0. , 0. , 0.1, 0.4, 2. ]])

cutoff raises the threshold above 0:

>>> li.ut.neg_to_zero(x, cutoff=0.5).toarray()
array([[0., 0., 0., 0., 2.]])
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