[MSNoise] Problem using 07.plot_dtt.py.

Hello, I am trying to run *07.plot_dtt.py <http://07.plot_dtt.py>* but there seems to be a problem: *oscar@bayta:~/sweet_noise$ py 07.plot_dtt.py <http://07.plot_dtt.py> * * /home/oscar/anaconda/lib/python2.7/site- packages/numpy/oldnumeric/__init__.py:11: ModuleDeprecationWarning: The oldnumeric module will be dropped in Numpy 1.9* * warnings.warn(_msg, ModuleDeprecationWarning)* * /home/oscar/anaconda/lib/python2.7/site-packages/setuptools-2.2- py2.7.egg/pkg_resources.py:991: UserWarning: /home/oscar/.python-eggs is writable by group/others and vulnerable to attack when used with get_resource_filename. Consider a more secure location (set with .set_extraction_path or the PYTHON_EGG_CACHE environment variable).* * loading 1 days* * Traceback (most recent call last):* * File "07.plot_dtt.py <http://07.plot_dtt.py>", line 115, in <module>* * py1_wmean, py1_wstd = get_wavgwstd(allbut)* * File "07.plot_dtt.py <http://07.plot_dtt.py>", line 59, in get_wavgwstd* * h = grouped.apply(wstd)* * File "/home/oscar/anaconda/lib/python2.7/site- packages/pandas/core/groupby.py", line 424, in apply* * return self._python_apply_general(f)* * File "/home/oscar/anaconda/lib/python2.7/site- packages/pandas/core/groupby.py", line 427, in _python_apply_general* * keys, values, mutated = self.grouper.apply(f, self.obj, self.axis)* * File "/home/oscar/anaconda/lib/python2.7/site- packages/pandas/core/groupby.py", line 883, in apply* * res = f(group)* * File "/home/oscar/anaconda/lib/python2.7/site- packages/pandas/core/groupby.py", line 422, in f* * return func(g, *args, **kwargs)* * File "07.plot_dtt.py <http://07.plot_dtt.py>", line 52, in wstd* * wstd = np.sqrt(np.sum(w * (d - wavg) ** 2) / ((N - 1) * np.sum(w) / N))* * ZeroDivisionError: float division by zero* I do not have much experiencie using python. if anyone has any idea I will appreciate it! Oscar