kurtosis() / kurtosis_y() / kurtosis_x()

Toolkit

TimescaleDB Toolkit functions are available under Timescale Community Edition. They are automatically included with Timescale Cloud. Click to learn more.

kurtosis(summary StatsSummary1D, method TEXT) RETURNS BIGINT

kurtosis_y(summary StatsSummary2D, method TEXT) RETURNS BIGINT

kurtosis_x(summary StatsSummary2D, method TEXT) RETURNS BIGINT

Calculate the kurtosis, or the fourth statistical moment, of the values contained in a statistical aggregate. In a two-dimensional stats_agg use the _y/ _x form to access the kurtosis of the dependent and independent variables.

The method determines whether you calculate a population or sample kurtosis. These values can be provided as their full names, or you can abbreviate them as pop or samp. These are the only four accepted values for the method argument. The default is sample.

For more information about statistical aggregate functions, see the hyperfunctions documentation.

Required arguments

Optional arguments

Returns

Sample usage

SELECT kurtosis_y(stats_agg(data, data))
FROM generate_series(0, 100) data;

kurtosis_y 
------------
    1.78195