I have matrix , which presented as 2 dimensional array. It seems like I can use numpy.ndarray.tofile to export it into text file, but it just generate everything in one line. How can I get text file in matrix format(say, one line is one row in matrix)? like
1 2 3
4 5 6
7 8 9
instead of
1 2 3 4 5 6 7 8 9
Consult this post about writing numpy arrays to files: Write multiple numpy arrays to file
The code should be something like:
#data is a numpy array
data = numpy.array([[1, 2, 3],[4, 5, 6],[7, 8, 9]])
# Save the array back to the file
np.savetxt('test.txt', data)
This yields the following (almost human-readable) output:
1.000000000000000000e+00 2.000000000000000000e+00 3.000000000000000000e+00
4.000000000000000000e+00 5.000000000000000000e+00 6.000000000000000000e+00
7.000000000000000000e+00 8.000000000000000000e+00 9.000000000000000000e+00
with open('path/to/file', 'w') as outfile:
for row in matrix:
outfile.write(' '.join([str(num) for num in row]))
outfile.write('\n')