Changes for 0.71 ================ .. code-block:: text Significant numerix namespace changes, introduced to resolve namespace clashes between python built-ins and mlab names. Refactored numerix to maintain separate modules, rather than folding all these names into a single namespace. See the following mailing list threads for more information and background http://sourceforge.net/mailarchive/forum.php?thread_id=6398890&forum_id=36187 http://sourceforge.net/mailarchive/forum.php?thread_id=6323208&forum_id=36187 OLD usage from matplotlib.numerix import array, mean, fft NEW usage from matplotlib.numerix import array from matplotlib.numerix.mlab import mean from matplotlib.numerix.fft import fft numerix dir structure mirrors numarray (though it is an incomplete implementation) numerix numerix/mlab numerix/linear_algebra numerix/fft numerix/random_array but of course you can use 'numerix : Numeric' and still get the symbols. pylab still imports most of the symbols from Numerix, MLab, fft, etc, but is more cautious. For names that clash with python names (min, max, sum), pylab keeps the builtins and provides the numeric versions with an a* prefix, e.g., (amin, amax, asum)