simple.py 文件源码

def log1p(data, copy=False):
    """Logarithmize the data matrix.

    Computes `X = log(X + 1)`, where `log` denotes the natural logrithm.

    Parameters
    ----------
    data : array-like or AnnData
        The data matrix.
    copy : bool (default: False)
        If an AnnData is passed, determines whether a copy is returned.

    Returns
    -------
    Returns or updates data, depending on `copy`.
    """
    if isinstance(data, AnnData):
        adata = data.copy() if copy else data
        adata.X = log1p(data.X)
        return adata if copy else None
    X = data  # proceed with data matrix
    if not issparse(X):
        return np.log1p(X)
    else:
        return X.log1p()