On Mon, Apr 11, 2011 at 23:43, Mark Wiebe <mwwiebe@gmail.com> wrote:
On Mon, Apr 11, 2011 at 8:48 PM, Travis Oliphant <oliphant@enthought.com> wrote:
It would be good to see a simple test case and understand why the boolean multiplied by the scalar double is becoming a float16. In other words, why does (1-test)*t return a float16 array This does not sound right at all and it would be good to understand why this occurs, now. How are you handling scalars multiplied by arrays in general?
The reason it's float16 is that the first function in the multiply function list for which both types can be safely cast to the output type,
Except that float64 cannot be safely cast to float16.
after applying the min_scalar_type function to the scalars, is float16.
This is implemented incorrectly, then. It makes no sense for floats, for which the limiting attribute is precision, not range. For floats, the result of min_scalar_type should be the type of the object itself, nothing else. E.g. min_scalar_type(x)==float64 if type(x) is float no matter what value it has. -- 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