grassp.pp.filter_proteins_per_replicate

filter_proteins_per_replicate(data, grouping_columns, min_replicates=1, min_samples=1, inplace=True)

Filter proteins based on detection in replicates.

Parameters:

data AnnData

The annotated data matrix with proteins as observations (rows).

grouping_columns Union[str, List[str]]

Column name(s) in data.var to group samples into replicates.

min_replicates int (default: 1)

Minimum number of replicates a protein must be detected in to pass filtering.

min_samples int (default: 1)

Minimum number of sample groups a protein must be detected in to pass filtering.

inplace bool (default: True)

Whether to modify data in place or return a copy.

Return type:

ndarray | None

Returns:

numpy.ndarray or None If inplace=False, returns boolean mask indicating which proteins passed filtering. If inplace=True, returns None and modifies input data.

Notes

This function filters proteins based on their detection pattern across replicates. For each group of samples (defined by grouping_columns), it requires proteins to be detected in at least min_replicates samples. The protein must pass this threshold in at least min_samples groups to be kept.