Kurtosis function

[#1]

Hi,

I trying to use Kurtosis function but i'm wrong.

I tried this example:

In my graph,

Dimension: Year

Expression: kurtosis(days*nb_guests*price)

Another example which i don't understand:

Value of Dimension Month:

janv.
févr.
mars
avr.
mai
juin
juil.
août
sept.
oct.
nov.
déc.

i created another dimension Kurtosis(Month) and display it in a table. I got this:

Year kurtosis(Month)
1998 -0,96518961
1999 -0,82098879
2000 -0,66337403

What is the correct use of this function?

Thanks