Hello all It seems signaltools.py is missing some imports in SciPy 0.4.6. The following code: from scipy.signal import triang print triang(3) causes the following traceback: Traceback (most recent call last): File "frags.py", line 10, in ? print triang(3) File "C:\Python24\Lib\site-packages\scipy\signal\signaltools.py", line 579, in triang w = numpy.r_[w, w[-2::-1]] NameError: global name 'numpy' is not defined At the top of signaltools.py we have: import numpy as Numeric This seems incorrect. I've filed this issue in Trac: http://projects.scipy.org/scipy/scipy/ticket/10 Regards Albert