[MATRIX-SIG] Fix to NumPy10
Kevin Rodgers
krodgers@tdyryan.com
Fri, 06 Mar 1998 12:32:56 -0800
At 05:59 PM 3/6/98 -0000, Andrey Kaliazin wrote:
>Look - another bug? (I use Win'95, Python 1.5, Numpy10)
>Maybe it is a supposed behaviour, but ...
>>>> r = arange(13)
>>>> r
>array([ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12])
>>>> ar=pow(10,r)
>### ar=10**r produce the same
>>>> ar
>array([1, 10, 100,1000, 10000,100000,
> 1000000, 10000000, 100000000, 1000000000,
> 1410065408, 1215752192, -727379968])
>
>How do you like it? I do not.
>never can be 10**10 =1410065408
>
>of course, 10.0**r gives "right" result.
If you omit the "type" argument to array, it will pick the smallest type
that all of the array elements will fit in, so in your case it picked
32-bit signed integer. 10**10 overflows a 32-bit signed integer . . .
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Kevin Rodgers Teledyne Ryan Aeronautical krodgers@tdyryan.com
"This one goes up to eleven." -- Nigel Tufnel
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