In [1]:

    

import numpy as np


    

In [2]:

    

a = np.arange(8).reshape((2,4))
print(a)


    

    




[[0 1 2 3]
 [4 5 6 7]]

In [8]:

    

b = np.max(a, axis=1).reshape((2, -1))
print(b)

print(np.max(a))

print(np.maximum(a, 2))


    

    




[[3]
 [7]]
7
[[2 2 2 3]
 [4 5 6 7]]

In [9]:

    

c = a - b
print(c)


    

    




[[-3 -2 -1  0]
 [-3 -2 -1  0]]

In [16]:

    

d = [2, 1]
print(a[range(2), d].reshape((2,-1)))


    

    




[[2]
 [5]]

In [11]:

    

e = np.sum(d, axis=1)
print(e)


    

    




[ 14 126]

In [12]:

    

y = [1, 2]
aa = d[range(2), y].reshape((2,-1))
print(aa)


    

    




[[ 1]
 [36]]

In [13]:

    

print(d/aa)


    

    




[[0 1 4 9]
 [0 0 1 1]]

In [21]:

    

print(np.logspace(-4, 2, 7))
print(np.logspace(-3, 2, 6))


    

    




[  1.00000000e-04   1.00000000e-03   1.00000000e-02   1.00000000e-01
   1.00000000e+00   1.00000000e+01   1.00000000e+02]
[  1.00000000e-03   1.00000000e-02   1.00000000e-01   1.00000000e+00
   1.00000000e+01   1.00000000e+02]

In [ ]: