> 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.