Delimiter of numpy.savetxt

file-io, numpy, python, python-3.x

Solution

You need 2D array, axis 0 is the row, and axis 1 is the column. So I use `z[None, :]` to convert it to 2D array:

from StringIO import StringIO
s = StringIO()
z = np.array([1,2,3])
np.savetxt(s,z[None, :],delimiter='hi')
s.getvalue()

output:

1.000000000000000000e+00hi2.000000000000000000e+00hi3.000000000000000000e+00\n

Problem

I am trying to write a numpy array to a `.txt` file using `numpy.savetxt`. To the best I can tell, the following code follows the documentation: ``` z = np.array([1,2,3]) np.savetxt('testdata.txt',z,delimiter='hi') ``` However, the output file, opened with Notepad, shows ``` 1.000000000000000000e+002.000000000000000000e+003.000000000000000000e+00 ``` without the delimiter `hi` between the values. Any ideas why this might be? My goal is to add new lines between each value.

Original source