MATLAB: Indexing for a character vector and referring to them in a while loop

indexing

Is it possible to have a set of data under a while loop and add them to a vector of matrices and then refer back to that same vector? For example, the user enters a set of data into a program whilst its under a while loop with an if statement and the program then refers back to that same data under a different if statement? The program below allows to list people but is it possible to add the people listed to a character vector and refer back to it when you have count them or pick one of them out. I could add 3 people of different ages and names and then count how many of them are added.
while prompt >=' '
    prompt=input('\nWhat would you like to do: ', 's');
if strcmp(prompt,'list people')
        name=input('Name: ', 's');
        gender=input('Gender: ', 's');
        age=input('Age: ', 's');
elseif strcmp(prompt, 'count people') 
end
end

Best Answer

k = 0;
S = struct();
str = 'X';
while ~isempty(str)
    str = input('What would you like to do: ', 's');
    switch lower(str)
    case 'list'
        k = k+1;
        S(k).name   = input('Name: ', 's');
        S(k).gender = input('Gender: ', 's');
        S(k).age    = input('Age: ', 's');
    case 'count'
        disp(k)
    end
end
And tested:
>>
What would you like to do: list
Name: anna
Gender: F
Age: 31
What would you like to do: list
Name: bob
Gender: M
Age: 64
What would you like to do: count
 2
What would you like to do:
>>
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