- ak._v2.ak_max.max(array, axis=None, keepdims=False, initial=None, mask_identity=True, flatten_records=False)¶
array – Array-like data (anything
axis (None or int) – If None, combine all values from the array into a single scalar result; if an int, group by that axis:
0is the outermost,
1is the first level of nested lists, etc., and negative
axiscounts from the innermost:
-1is the innermost,
-2is the next level up, etc.
keepdims (bool) – If False, this reducer decreases the number of dimensions by 1; if True, the reduced values are wrapped in a new length-1 dimension so that the result of this operation may be broadcasted with the original array.
initial (None or number) – The minimum value of an output element, as an alternative to the numeric type’s natural identity (e.g. negative infinity for floating-point types, a minimum integer for integer types). If you use
initial, you might also want
mask_identity (bool) – If True, reducing over empty lists results in None (an option type); otherwise, reducing over empty lists results in the operation’s identity.
flatten_records (bool) – If True, axis=None combines fields from different records; otherwise, records raise an error.
Returns the maximum value in each group of elements from
types supported, including all Awkward Arrays and Records). The identity
of maximization is
-inf if floating-point or the smallest integer value
if applied to integers. This identity is usually masked: the maximum of
an empty list is None, unless
This operation is the same as NumPy’s
if all lists at a given dimension have the same length and no None values,
but it generalizes to cases where they do not.
ak.sum for a more complete description of nested list and missing
value (None) handling in reducers.