mmm wrote: > I wrote the code below to create simple arithmetic sequences that are > iter-able > I.e., this would basically combine the NUMPY arange(start,end,step) > to range(start,end), with step not necessarily an integer. > > The code below is in its simplest form and I want to generalize the > sequence types (multiplicative, cumulative, gauss ...), but first I > need the simple SEQA( ) function to be more robust. The problem is > the three test code functions produces different results based on > step. I understand why steps such as 0.1 have rounding and machine > math issues, and before I try to solve this I thought it was worth > asking if this problem has been solved (so I do not re-invent the > wheel).
Using numpy.arange() with floats is known to be problematic, and it is discouraged. Almost all of the use cases are better served with numpy.linspace() which accepts a start, end, and the number of points rather than a step. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco -- http://mail.python.org/mailman/listinfo/python-list
