How to write a numpy matrix in a text file - python

Question

Suppose I am getting a numpy matrix from some calculation. Here is my numpy matrix 'result1'::

    result1=
    [[   1.         0.         0.         0.00375   -0.01072   -0.      -1000.     ]
     [   2.         3.         4.         0.        -0.004    750.         0.     ]
     [   3.         3.         0.         0.         0.      -750.      1000.     ]]

Now I want to write this matrix in a text file named 'result.txt'. For this, I wrote the following code::

np.savetxt('result.txt', result1, fmt='%.2e')

But it is giving me all the elements of the matrix in one row.

    1.00e+00 0.00e+00 0.00e+00 3.75e-03 -1.07e-02 -1.14e-13 -1.00e+032.00e+00 3.00e+00 4.00e+00 0.00e+00 -4.00e-03 7.50e+02 0.00e+003.00e+00 3.00e+00 0.00e+00 0.00e+00 0.00e+00 -7.50e+02 1.00e+03

I want to write the matrix in the text file in the proper matrix format. How can I do this? I used keyword newline='\n' or newline='',but the result is same.

Thanks in advance...

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This edited part is for @Warren

try this one:

>>> import numpy as np
>>> mat=np.matrix([[1, 2, 3],[4, 5, 6],[7, 8, 9]])
>>> mat
matrix([[1, 2, 3],
        [4, 5, 6],
        [7, 8, 9]])
>>> np.savetxt('text.txt',mat,fmt='%.2f')

in my text.txt file, I am getting:

1.00 2.00 3.004.00 5.00 6.007.00 8.00 9.00

Answer 1

like Francesco Nazzaro's answer, but a little different to make sure the file can be opened successfully, try:

a = np.array([[1, 2, 3], [4, 5, 6], [7, 8, 9]])
mat = np.matrix(a)
with open('outfile.txt','wb') as f:
    for line in mat:
        np.savetxt(f, line, fmt='%.2f')