Non-null standard deviation (biased) (nnstddev)
Calculates the biased standard deviation of the non-null values of the selected field in each group.
How does it work in the search window?
After grouping the data, select Aggregation in the search window toolbar, then select the Non-null standard deviation (biased) operation. You need to specify one argument:
|Biased standard deviation of (mandatory)||integer, float|
The data type of the aggregated values is integer or float.
demo.ecommerce.data table, we want to calculate the biased standard deviation of the non-null values in the bytesTransferred column during each 5-minute period. Before aggregating the data, the table must be grouped in 5-minute intervals.
The arguments needed for the aggregation are:
- Biased standard deviation of - bytesTransferred column
Click Aggregate function and you will see the following result:
How does it work in LINQ?
Group your data using the following structure:
as... to add the new column that will show the aggregated values. This is the syntax for the Non-null standard deviation (biased) operation:
See Build a query using LINQ to learn more about grouping and aggregating your data using the LINQ language.
You can copy the following LINQ script and try the above example on the
from demo.ecommerce.data group every 5m every 5m select nnstddev(bytesTransferred) as bsd_non_null_bytes