Possibility to avoid certain values which are way too deviant while calculating threshold

[Rahul Amaram]

Hi Andre,

So, I would like to remove the outlier and calculate the mean for the 
remaining elements. Any suggestion apart from writing my own custom math 
function? Also, I don't think that you have shared the link.

Thanks,
Rahul.

On Thursday 18 December 2014 12:55 AM, Anders Håål wrote:
> Hi Rahul,
> Its possible, but the question is what algorithm to use. The second 
> question would also be what would you do with the remaining set, 
> calculate a mean?
> When it comes to exclude a deviant value it sound close to what is 
> called a outlier, http://en.wikipedia.org/wiki/Outlier. There are a 
> number of mathematical solutions to this problem, but not sure which 
> would be applicable or correct. Check this link for a discussions on 
> the topic where one approach is using standard deviation, but from the 
> discussion it does not sound like a statistical correct approach.
>
> If you or anyone else on this list find an good approach, I more then 
> happy to try it. In Bischeck its possible to plug in your own 
> functions as described in 
> http://www.bischeck.org/wp-content/uploads/2014/06/Bischeck_installation_and_administration_guide.html#toc-Section-6.2 
> so you can easily do your own testing. Using the cache browser cli 
> http://www.bischeck.org/wp-content/uploads/2014/06/Bischeck_installation_and_administration_guide.html#toc-Section-4.4 
> you can easily test your function.
>
> Anders
>
>
> On 12/17/2014 03:40 PM, Rahul Amaram wrote:
>> Hi,
>>
>> I had a quick question. Let us say we calculate the threshold based 
>> on the values of the past six days, one value per day. Now let us 
>> say, out of 6 values, one of these values is way too deviant. Then is 
>> it possible to exclude this deviant value from calculating the 
>> threshold?
>>
>> Thanks,
>> Rahul.
>
>