MATLAB: Add a matrix of strings

Question

% Add a matrix of zeros to host the dummy variables
dum=zeros(length(Month),length(set_of_month));
T=[table(Month) array2table(dum)];

will add a matrix of zeros. But I want to add a matrix of some strings like

--------------
United States
United States

Then how can one modify the above code?

**********

This is what I did:

dum=zeros(height(T),1)
dum1=num2cell(dum)
dum1(dum==0)={'US'}
T1=cell2table(dum1) 
T=[T T1]

Answer 1

T = table(Month);
T.Country(:) = "United States";

or consider

T = table(Month);
T.Country(:) = categorical("United States");