numpy.amax() in Python Last Updated : 28 Apr, 2022 Comments Improve Suggest changes Like Article Like Report The numpy.amax() method returns the maximum of an array or maximum along the axis(if mentioned). Syntax: numpy.amax(arr, axis = None, out = None, keepdims = <class numpy._globals._NoValue>) Parameters - arr : [array_like] input dataaxis : [int or tuples of int] axis along which we want the max value. Otherwise, it will consider arr to be flattened.out : [ndarray, optional] alternative output array in which to place the resultkeepdims : [boolean, optional] if this is set to True, the axes which are reduced are left in the result as dimensions with size one. With this option, the result will broadcast correctly against the input array. If the default value is passed, then keepdims will not be passed through to the all method of sub-classes of ndarray, however any non-default value will be. If the sub-classes sum method does not implement keepdims any exceptions will be raised. Return - Maximum of array - arr[ndarray or scalar], scalar if axis is None; the result is an array of dimension a.ndim - 1, if axis is mentioned. Code - Python # Python Program illustrating # numpy.amax() method import numpy as geek # 1D array arr = geek.arange(8) print("arr : ", arr) print("Max of arr : ", geek.amax(arr)) # 2D array arr = geek.arange(10).reshape(2, 5) print("\narr : ", arr) # Maximum of the flattened array print("\nMax of arr, axis = None : ", geek.amax(arr)) # Maxima along the first axis # axis 0 means vertical print("Max of arr, axis = 0 : ", geek.amax(arr, axis = 0)) # Maxima along the second axis # axis 1 means horizontal print("Max of arr, axis = 1 : ", geek.amax(arr, axis = 1)) Output - arr : [0 1 2 3 4 5 6 7] Max of arr : 7 arr : [[0 1 2 3 4] [5 6 7 8 9]] Max of arr, axis = None : 9 Max of arr, axis = 0 : [5 6 7 8 9] Max of arr, axis = 1 : [4 9] Reference - https://docs.scipy.org/doc/numpy-1.13.0/reference/generated/numpy.amax.html Note - These codes won't run on online IDE's. So please, run them on your systems to explore the working. 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