MATLAB: Assign a value to a string

string

Dear all,
I have a list of string:
txt={'BBB3', 'BBB2', 'BBB1', 'A3', 'A2', 'A1','AA3','AA2','AA1'};
i would like to assign a value to each string. For instance,
Here is my code for i=1:length(txt) if isequal(txt{'i'},'BBB3')
             txt{'i'}=11;
           elseif isequal(txt{'i'},'BBB2')
            txt{'i'}=12; 
            elseif isequal(txt{'i'},'BBB1')
            txt{'i'}=13;    
             elseif isequal(txt{'i'},'A3')
                 txt{'i'}=14;
           elseif isequal(txt{'i'},'A2')
               txt{'i'}=15;
           elseif isequal(txt{'i'},'A1')
                    txt{'i'}=16;
             elseif isequal(txt{'i'},'AA3')
                 txt{'i'}=17;
             elseif isequal(txt{'i'},'AA2')
                 txt{'i'}=18;
            else
               txt{'i'}=20;
           end 
         end
Basically the output I am looking for is:
txt={11, 12, 13, 14, 15, 16, 17, 18 ,19};
however when I run the code and type txt in the screen in order to retrieve the final output i still get the initial input which is txt={'BBB3', 'BBB2', 'BBB1', 'A3', 'A2', 'A1','AA3','AA2','AA1'};
I might have missed something somewhere. ANy help is much appreciated Thanks

Best Answer

Try it without the apostrophes around the i:
txt={'BBB3', 'BBB2', 'BBB1', 'A3', 'A2', 'A1','AA3','AA2','AA1'};
for k =1 : length(txt) 
  if isequal(txt{k},'BBB3')    
    txt{k}=11;    
  elseif isequal(txt{k},'BBB2')    
    txt{k}=12;    
  elseif isequal(txt{k},'BBB1')
    txt{k}=13;    
  elseif isequal(txt{k},'A3')    
    txt{k}=14;    
  elseif isequal(txt{k},'A2')
    txt{k}=15;
  elseif isequal(txt{k},'A1')
    txt{k}=16;
  elseif isequal(txt{k},'AA3')
    txt{k}=17;
  elseif isequal(txt{k},'AA2')
    txt{k}=18;
  else
    txt{k}=20;
  end  
end
celldisp(txt);
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