[Numpy-discussion] min() of array containing NaN
Alok Singhal
as8ca@virginia....
Wed Aug 13 11:52:19 CDT 2008
On 12/08/08: 18:31, Charles R Harris wrote:
> On Tue, Aug 12, 2008 at 6:28 PM, Charles R Harris
> <[1]charlesr.harris@gmail.com> wrote:
> I suppose you could use
> min(a,b) = (abs(a - b) + a + b)/2
> which would have that effect.
>
> Hmm, that is for the max, min would be
> (a + b - |a - b|)/2
This would break when there is an overflow because of
addition/subtraction:
def new_min(a, b):
return (a + b - abs(a-b))/2
a = 1e308
b = -1e308
new_min(a, b) # returns -inf
min(a, b) # returns -1e308
--
* *
Alok Singhal * * *
http://www.astro.virginia.edu/~as8ca/
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