> 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.
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