How to calculate skewness and kurtosis via 'groupsummary'?

Hi!

I have a question about how to calculate skewness and kurtosis using the 'groupsummary' function.

I am working with a subset of variables from a table.

Thanks for your help!

Answer 1

[dpb]

Presuming you have the Statistics Toolbox which defines the two statistics of interest m-files--

G = groupsummary(T,groupvars,method,datavars)

where

method={'skewness','kurtosis'};

You'll define the other inputs to match your wishes on grouping and data variables.

If you don't have the requisite TB, then write your own functions and refer to them in their place.

[Jiashun Wu]

Thanks dpb for your comments.

I do have the Statistics Toolbox (Fullname: Statistics and Machine Learning Toolbox).

But the computation methods in groupsummary do not include 'skewness' nor 'kurtosis' (i.e., the code you provided would not work) --- https://www.mathworks.com/help/matlab/ref/double.groupsummary.html?s_tid=doc_ta.