[Numpy-discussion] corrcoeff on big matrix

Colin J. Williams cjw at sympatico.ca
Tue Mar 16 19:20:12 CST 2004


I'm puzzled that anyone would want to explore the correlation among 42 
variables.  I would suggest (1) having a go with the more significant of 
the 42 variables and (2) working with a a much smaller sample, say < 4,000.

Todd Miller wrote:
[snip]

>On Tue, 2004-03-16 at 10:41, CL WU wrote:
>  
>
>One possibility is to consider using Float32 to stretch out your
>memory.  I don't know whether that's numerically viable or not.
>
>Another way is 64-bit computing.  That is largely unexplored territory,
>and Python itself has issues there.  It will likely take some work
>because we haven't done it yet ourselves.
>  
>
Todd,

I'd be grateful if you could clarify this, do we nor have _nt.Float64 now?

Colin W.

>I hope this at least sheds some light on the problem, if not the actual
>solution.
>
>Regards,
>Todd
>
>  
>
>>BTW, I am using numarray 0.9/python 2.3.3 on win2kSP4
>>
>>Thanks.
>>
>>Chunlei
>>
>>
>>
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