Answers for "np max in array"

max of matrix numpy

# Get the maximum element from a Numpy array
maxElement = numpy.amax(arr)
 
print('Max element from Numpy Array : ', maxElement)

Finding the maximum element from a matrix with Python numpy.argmax()

import numpy as np    

a = np.matrix([[1,2,3,33],[4,5,6,66],[7,8,9,99]])

print(np.argmax(a))  # 11, which is the position of 99
print(np.argmax(a[:,:]))  # 11, which is the position of 99
print(np.argmax(a[:1]))  # 3, which is the position of 33
print(np.argmax(a[:,2]))  # 2, which is the position of 9
print(np.argmax(a[1:,2]))  # 1, which is the position of 9

np find arg max in matrix

>>> a = numpy.random.random((10, 10))
>>> numpy.unravel_index(a.argmax(), a.shape)
(6, 7)
>>> a[6, 7] == a.max()
True