#### 8.2.55.8 table.groupby ¶

Method: `[out] =` groupby `(obj, groupvars, aggcalcs)` ¶

  Find groups in table data and apply functions to variables within groups.

  This works like an SQL `"SELECT ... GROUP BY ..."` statement.

  groupvars (cellstr, numeric) is a list of the grouping variables, identified by name or index.

  aggcalcs is a specification of the aggregate calculations to perform on them, in the form `{`out_var`,` fcn`,` in_vars`; ...}`, where: out_var (char) is the name of the output variable fcn (function handle) is the function to apply to produce it in_vars (cellstr) is a list of the input variables to pass to fcn

  Returns a table.

  This is a Tablicious/Octave extension, not defined in the Matlab table interface.