>>> myarray.astype(n.int) returns the same values as >>> n.floor(myarray).astype(n.int) for positive values??
And the same as >>> n.trunc(myarray) for any value? On Mon, Sep 25, 2017 at 5:36 PM, Mark Bakker <mark...@gmail.com> wrote: > > On 2017-09-25 10:59, Renato Fabbri wrote: > >> > > """ >> > > In [3]: n.floor(n.linspace(0,5,7), dtype=n.int <http://n.int>) >> > > ------------------------------------------------------------ >> > --------------- >> > > TypeError Traceback (most recent call >> > last) >> > > <ipython-input-3-1471f5d738e8> in <module>() >> > > ----> 1 n.floor(n.linspace(0,5,7), dtype=n.int <http://n.int>) >> > > >> > > TypeError: No loop matching the specified signature and casting >> > > was found for ufunc floor >> > > >> > > In [4]: n.__version__ >> > > Out[4]: '1.11.0' >> > > """ >> > > >> > > Is this the expected behavior? >> > >> > Yes. There is no floor function for integers. >> > >> > The dtype argument specified not only the return type, but the type the >> > calculation is done in as well. floor() only exists, and only makes >> > sense, for floats. (You can use floor(a, dtype='f4') and so on to insist >> > on floats of a different width) >> > > +1 for specifying a dtype in np.floor and np.ceil. > > Now it is pretty odd that np.floor and np.ceil results in an integer, > except for that it doesn't. it returns a float with all zeros as the > decimals. It would be very useful to be able to specify the dtype at 'int'. > I frequently use floor or ceil to determine the indices of an array, but > now need to convert to integers in addition to floor and ceil. > > > _______________________________________________ > NumPy-Discussion mailing list > NumPy-Discussion@python.org > https://mail.python.org/mailman/listinfo/numpy-discussion > > -- Renato Fabbri GNU/Linux User #479299 labmacambira.sourceforge.net
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