> Alan Isaac wrote: >> Like SciPy's cumsum.
"Colin J. Williams" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] > Doesn't numarray handle this? Sure. One might say that numarray is in the process of becoming scipy. But I was looking for a solution when these are available. Something like: def cumreduce(func, seq, init = None): """Return list of cumulative reductions. Example use: >>> cumreduce(operator.mul, range(1,5),init=1) [1, 2, 6, 24] >>> :author: Alan Isaac :license: public domain """ if not seq: cr = [init]*bool(init) else: cr = [seq[0]] * len(seq) if init: cr[0] = func(cr[0],init) for idx in range(1,len(seq)): cr[idx] = func(cr[idx-1],seq[idx]) return cr -- http://mail.python.org/mailman/listinfo/python-list
