[Swift-devel] Use case and examples needed to avoid large directories

[andrewj at uchicago.edu]

Hey all,

 Thanks for diving right in on the issues at hand.  Sorry I
haven't been more vocal, I will be more as time progresses, my
parents were in this weekend.

I will shortly be getting the first Swift code, etc. put
together soon and let you know how it goes.

Thanks,
Andrew  

 

---- Original message ----
>Date: Sun, 30 Sep 2007 20:46:32 -0500
>From: Mihael Hategan <hategan at mcs.anl.gov>  
>Subject: Re: [Swift-devel] Use case and examples needed to
avoid large directories  
>To: Ben Clifford <benc at hawaga.org.uk>
>Cc: Michael Wilde <wilde at mcs.anl.gov>, Andrew Jamieson
<andrewj at uchicago.edu>, swift-devel <swift-devel at ci.uchicago.edu>
>
>On Sun, 2007-09-30 at 19:48 +0000, Ben Clifford wrote:
>> 
>> On Sun, 30 Sep 2007, Michael Wilde wrote:
>> 
>> > examples, where softmean needs to average a large set of
inputs, and its
>> > behavior is, we thing, associatve.
>> 
>> mean as an operator is not usually associative - I'd think
softmean isn't 
>> either if its doing per-pixel arithmetic means, which is
what I've always 
>> assumed it was doing.
>> 
>> (e.g.   (1 mean 2) mean 3) = (( (1+2)/2) + 3)/2 = 2.25
>>         1 mean (2 mean 3) = ( 1 + ( (2+3)/2) ) /2 = 1.75
>> 
>> and neither are the actual mean of (1,2,3) which is 2.
>
>... assuming the operation is associative.
>
>In this case perhaps the mean, on whatever group, may very
well be
>defined as (x1 + x2 + ... + xn)/n. If we have access to "+"
and "/",
>then it should be fine.
>
>> 
>