[smokeping-users] Re: graph question

[Tobias Oetiker]

Wednesday Arnold Nipper wrote:

> On 13.04.2005 05:35 Jason D. Hammerschmidt wrote
>
> >>> This is going to be a really dumb question, but can someone explain
> >>> to me
> >>> the relevance of the light/dark gray entries on the smokeping graphs?
> >>>  Is
> >>> this the variance over the 20 requests?
> >> Actually it's not really the variance but all of the n values scattered
> >> around the median.
> >
> > Excellent question actually, but I am confused about the answer.  If
> > it's variance around the median, why do so many of my graphs show grey
> > lines skewed on only one side?  Usually upwards?  If it was around the
> > median, should it be grey on both sides of the main coloured bar?  Or
> > does that represent something different?
> >
>
> Imho that may only happen when the set of ping results consists of only
> two values. The lower one is the coloured line and you have exactly one
> grey shadow above. In any other case you should have grey shadows on
> *both* sides of the coloured line.

assume you have the following values

5,5,5,5,5,8,9,10,11

then the median is 5 ... and you will see grey only above ... this
is actually quite a normal behaviour ... since pakets seldom travel
faster, than normal ... only slower ...

cheers
tobi
>
>
>
> Arnold
>
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