On Wed, Jul 21, 2010 at 15:12, wheres pythonmonks <wherespythonmo...@gmail.com> wrote: > I have an recarray -- the first column is date. > > I have the following function to compute the number of unique dates in > my data set: > > > def byName(): return(len(list(set(d['Date'])) )) > > Question: is the string 'Date' looked up at each iteration? If so, > this is dumb, but explains my horrible performance. > Or, is there a better way to code the above?
len(np.unique(d['Date'])) If you can come up with a self-contained example that we can benchmark, it would help. In my examples, I don't see any hideous performance, but my examples may be missing some crucially important detail about your data that is causing your performance problems. -- 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 _______________________________________________ NumPy-Discussion mailing list NumPy-Discussion@scipy.org http://mail.scipy.org/mailman/listinfo/numpy-discussion
