How to express or write short integers in MATLAB?

Hi there, I am replicating some lines of code from C language in MATLAB evironment. Although I have completed the code but I am still getting some issues therefore, I am having some issue in the generated DATA.

Kindly if someone tell me how to properly use short in MATLAB as shown in the following picture

Here is what I am currently doing in my code

   i_acc = bitshift(int16(i_acc+64),-7);
        q_acc = bitshift(int16(q_acc+64),-7);
        
% %         converting data
%         i_acc = typecast(i_acc, 'int16');
%         q_acc = typecast(q_acc, 'int16');
%         
        % Buffer 
        iq_buff(isamp*2)= i_acc;
        iq_buff(isamp*2+1) = q_acc;

[Bjorn Gustavsson]

You'll get more better help faster if you explain what "some issue" is.