Should numpy.sqrt(-1) return 1j rather than nan?

Travis Oliphant oliphant.travis at
Thu Oct 12 01:26:17 CDT 2006

David Goldsmith wrote:
> Travis Oliphant wrote:
>> pearu at wrote:
>>> Could sqrt(-1) made to return 1j again? 
>> Not in NumPy.  But, in scipy it could.
> Ohmigod!!!  You are definitely going to scare away many, many potential 
> users - if I wasn't obliged to use open source at work, you'd be scaring 
> me away.
Why in the world does it scare you away.  This makes no sense to me.   
If you don't like the scipy version don't use it.   NumPy and SciPy are 
not the same thing.

The problem we have is that the scipy version (0.3.2) already had this 
feature (and Numeric didn't).   What is so new here that is so scary ?


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