Bruce Southey wrote:
> Alan McIntyre wrote:
>> On Thu, Jun 5, 2008 at 10:16 PM, Keith Goodman <[EMAIL PROTECTED]>
>> wrote:
>>
>>> How can that lead to instability? If the last half-million values are
>>> small then they won't have a big impact on the mean even if they are
>>> ignored. The varia
Alan McIntyre wrote:
> On Thu, Jun 5, 2008 at 10:16 PM, Keith Goodman <[EMAIL PROTECTED]> wrote:
>
>> How can that lead to instability? If the last half-million values are
>> small then they won't have a big impact on the mean even if they are
>> ignored. The variance is a mean too (of the squar
On Thu, Jun 5, 2008 at 10:16 PM, Keith Goodman <[EMAIL PROTECTED]> wrote:
> How can that lead to instability? If the last half-million values are
> small then they won't have a big impact on the mean even if they are
> ignored. The variance is a mean too (of the squares), so it should be
> stable t
On Thu, Jun 5, 2008 at 7:55 PM, Alan McIntyre <[EMAIL PROTECTED]>
wrote:
> On Thu, Jun 5, 2008 at 9:06 PM, Keith Goodman <[EMAIL PROTECTED]> wrote:
> > On Thu, Jun 5, 2008 at 4:54 PM, Christopher Marshall
> > Are you worried that the mean might overflow on the intermediate sum?
>
> I suspect (but
On Thu, Jun 5, 2008 at 6:55 PM, Alan McIntyre <[EMAIL PROTECTED]> wrote:
> On Thu, Jun 5, 2008 at 9:06 PM, Keith Goodman <[EMAIL PROTECTED]> wrote:
>> On Thu, Jun 5, 2008 at 4:54 PM, Christopher Marshall
>> Are you worried that the mean might overflow on the intermediate sum?
>
> I suspect (but ple
On Thu, Jun 5, 2008 at 9:06 PM, Keith Goodman <[EMAIL PROTECTED]> wrote:
> On Thu, Jun 5, 2008 at 4:54 PM, Christopher Marshall
> Are you worried that the mean might overflow on the intermediate sum?
I suspect (but please correct me if I'm wrong, Christopher) he's
asking whether there's cases wher
On Thu, Jun 5, 2008 at 4:54 PM, Christopher Marshall
<[EMAIL PROTECTED]> wrote:
> I will be calculating the mean and variance of a vector with millions of
> elements.
>
> I was wondering how well numpy's mean and variance functions handle the
> numerical stability of such a calculation.
How's th
I will be calculating the mean and variance of a vector with millions of
elements.
I was wondering how well numpy's mean and variance functions handle the
numerical stability of such a calculation.
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