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    %% Determine if Workspace Variable Is Table  

%% 
% Create a workspace variable, |T|. 
T = table(categorical({'M';'F';'M'}),[45 45;41 32;40 34],...
    {'NY';'CA';'MA'},[true;false;false])  

%% 
% Verify that the workspace variable, |T|, is a table. 
istable(T) 

%%
% |T| is a table.