[SciPy-user] Array functions

Christian Kristukat ckkart at hoc.net
Mon Aug 8 06:27:02 CDT 2005

Howey, David A wrote:
> I guess this is a numpy question, but how do I do truth tests on arrays?
> I'm trawling around the documentation but struggling to find an answer..
> I want to test if any array contains ONLY zeros.
> Originally I had:
>  if a == 0:
> 	# code in here
> I need this to be true both for 
> a = 0 # ie a is just a number
> and for
> a = array((0,0,0,0,0))

Have a look at sometrue/alltrue:

e.g. alltrue(a==0.0) returns True if all elements are zero.


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