Thanks a lot for your reply. I'll have a look at the numpy-discussion for future issues.
FYI, I'm using Python 2.4.3 for Windows (Enthought Edition) and the included IPython shell. I found my mistake; importing of pylab. E.g., this works from pylab import * ; from scipy import * ; y = arange(3) ; y[y>1] = 0 but not from scipy import * ; from pylab import * ; z = arange(3) ; z[z>1] = 0 Using the 'whos' command, I can see that y is an ndarray type, whereas z is an array type. (I also see a lot of functions, etc. How can I list just the variables?) It seems a bit risky to use 'from scipy import *'. Maybe it's better to use 'import scipy' and then scipy.arange, to be sure what is actually being used? Would there be any disadvanages with that approach, other than more use of the keyboard? -- http://mail.python.org/mailman/listinfo/python-list
