deepest, shallowest, average

Linus Torvalds torvalds at linux-foundation.org
Mon Jun 9 19:25:27 PDT 2014


On Mon, Jun 9, 2014 at 6:56 PM, Dirk Hohndel <dirk at hohndel.org> wrote:
>
> Average right now is the average depth of all the dives - not the average
> of all the deepest depths. From a mathematical point of view this makes
> perfect sense. But it is extremely unintuitive - especially when the
> average frequently is less than the minimum :-/

I suspect we should just start getting rid of the whole "average"
depth - even within a single dive. I don't think people care.

The main reason to ever care about the average depth is likely for the
single-tank SAC rate calculation, but we do that in a much more
generic way, so never mind. It's all a historical mistake to even
bring it up.

So I'd argue for getting rid of the current average depth, and instead
talk about "mean max depth". And even then, we might go for median
rather than mean. I suspect median max depth is a more valuable and
interesting value than the mean max depth.

But in the end, I don't actually personally much care.

              Linus


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