from numarray import * x = ones(22400,Float) print add.reduce(x)
22400.0
print add.reduce(x!=0)
-128
print add.reduce((x!=0).astype(Int))
22400
it seems like the boolean result of the expression ( middle try ) causes a problem?
thanks, Stefan Kuzminski
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On Fri, 2005-08-26 at 13:24, Stefan Kuzminski wrote:
from numarray import * x = ones(22400,Float) print add.reduce(x)
22400.0
print add.reduce(x!=0)
-128
print add.reduce((x!=0).astype(Int))
22400
it seems like the boolean result of the expression ( middle try ) causes a problem?
This issue has been discussed before and the general consensus was that this (somewhat treacherous) behavior should not change.
For array totals (reducing on all axes at once), numarray has a sum() method which by default does do a type promotion to the "max type of kind", so integers -> Int64, floats -> Float64, and complexes -> Complex64 prior to the reduction.
Regards, Todd
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Stefan Kuzminski -
Todd Miller