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scipy.sparse.csr_matrix.

# max

csr_matrix.max(axis=None, out=None, *, explicit=False)

  Return the maximum of the array/matrix or maximum along an axis.

  By default, all elements are taken into account, not just the non-zero ones. But with explicit set, only the stored elements are considered.

  Parameters:
    axis{-2, -1, 0, 1, None} optional

      Axis along which the sum is computed. The default is to compute the maximum over all elements, returning a scalar (i.e., axis = None).

    out None, optional

      This argument is in the signature solely for NumPy compatibility reasons. Do not pass in anything except for the default value, as this argument is not used.

    explicit{False, True} optional (default: False)

      When set to True, only the stored elements will be considered. If a row/column is empty, the sparse.coo_array returned has no stored element (i.e. an implicit zero) for that row/column.

      Added in version 1.15.0.

  Returns:
    amax coo_array or scalar

      Maximum of a. If axis is None, the result is a scalar value. If axis is given, the result is a sparse.coo_array of dimension `a.ndim - 1`.

  See also

  `min`

    The minimum value of a sparse array/matrix along a given axis.

  `numpy.max`

    NumPy’s implementation of ‘max’