PYTHON

how to write a numpy array to a file in python

numpy.savetxt(fname, X, fmt='%.18e', delimiter=' ', newline='
', 
              header='', footer='', comments='# ', encoding=None)


x = y = z = np.arange(0.0,5.0,1.0)
np.savetxt('test.out', x, delimiter=',')   # X is an array
np.savetxt('test.out', (x,y,z))   # x,y,z equal sized 1D arrays
np.savetxt('test.out', x, fmt='%1.4e')   # use exponential notation

Saving NumPy array to a File

# We create a rank 1 ndarray
x = np.array([1, 2, 3, 4, 5])

# We save x into the current directory as 
np.save('my_array', x)

# We load the saved array from our current directory into variable y
y = np.load('my_array.npy')