In [1]:

    

import numpy as np


    

In [2]:

    

a = np.arange(6).reshape(2, 3)
print(a)


    

    




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

In [3]:

    

np.savetxt('data/temp/np_savetxt.txt', a)


    

In [4]:

    

with open('data/temp/np_savetxt.txt') as f:
    print(f.read())


    

    




0.000000000000000000e+00 1.000000000000000000e+00 2.000000000000000000e+00
3.000000000000000000e+00 4.000000000000000000e+00 5.000000000000000000e+00

In [5]:

    

np.savetxt('data/temp/np_savetxt_5e.txt', a, fmt='%.5e')


    

In [6]:

    

with open('data/temp/np_savetxt_5e.txt') as f:
    print(f.read())


    

    




0.00000e+00 1.00000e+00 2.00000e+00
3.00000e+00 4.00000e+00 5.00000e+00

In [7]:

    

print(np.loadtxt('data/temp/np_savetxt.txt'))


    

    




[[0. 1. 2.]
 [3. 4. 5.]]

In [8]:

    

np.savetxt('data/temp/np_savetxt_5f.txt', a, fmt='%.5f')


    

In [9]:

    

with open('data/temp/np_savetxt_5f.txt') as f:
    print(f.read())


    

    




0.00000 1.00000 2.00000
3.00000 4.00000 5.00000

In [10]:

    

np.savetxt('data/temp/np_savetxt_d.txt', a, fmt='%d')


    

In [11]:

    

with open('data/temp/np_savetxt_d.txt') as f:
    print(f.read())


    

    




0 1 2
3 4 5

In [12]:

    

print(a * 10)


    

    




[[ 0 10 20]
 [30 40 50]]

In [13]:

    

np.savetxt('data/temp/np_savetxt_x.txt', a * 10, fmt='%04x')


    

In [14]:

    

with open('data/temp/np_savetxt_x.txt') as f:
    print(f.read())


    

    




0000 000a 0014
001e 0028 0032

In [15]:

    

np.savetxt('data/temp/np_savetxt.csv', a, delimiter=',', fmt='%d')


    

In [16]:

    

with open('data/temp/np_savetxt.csv') as f:
    print(f.read())


    

    




0,1,2
3,4,5

In [17]:

    

np.savetxt('data/temp/np_savetxt.tsv', a, delimiter='\t', fmt='%d')


    

In [18]:

    

with open('data/temp/np_savetxt.tsv') as f:
    print(f.read())


    

    




0	1	2
3	4	5

In [19]:

    

a_3d = np.arange(24).reshape(2, 3, 4)
print(a_3d)


    

    




[[[ 0  1  2  3]
  [ 4  5  6  7]
  [ 8  9 10 11]]

 [[12 13 14 15]
  [16 17 18 19]
  [20 21 22 23]]]

In [20]:

    

# np.savetxt('data/temp/np_savetxt_3d.txt', a_3d)
# ValueError: Expected 1D or 2D array, got 3D array instead