How can I plus two or more strings?

I have:

person=[1,2];
for i=1:length(person)    
       if (person(i))== 1
            str=sprintf('Person  A');

         elseif (output(i))==2
              str=sprintf('Person B');

         elseif (output(i))==3
              str=sprintf('Person C');

         elseif (output(i))==4
              str=sprintf(' Person D');

         elseif (output(i))==5
              str=sprintf('Person E');

         else
              str=sprintf('System can not detect!');            
         end
  end

% How can I plus result in each loop, like this:
str='Person A   Person B'

Thank for your help!

Answer 1

[Ced]

Version 1:

You can concatenate two strings like matrix elements, i.e.

str1 = 'Person A ';
str2 = 'Person B ';
str = [ str1 str2 ]

Version 2: Since you are not actually using the output, I would do:

person = [ 1 2 ];
str_all = {'Person A ', 'Person B ', 'Person C ', 'Person D ', 'Person E '};
str = [ str_all{person} ];

No need for any loop or if statements.

If the last space bothers you, just remove it at the end with

str(end) = '';

Answer 2

[Steven Lord]

Some languages use + to concatenate strings. In MATLAB, however, you concatenate character arrays the same way you concatenate other types of arrays: using square brackets.

 x = 1:5;
 y = 6:10;
 z = [x, y] % 1:10
 w1 = 'abra';
 w2 = 'cadabra';
 w = [w1, w2] % 'abracadabra'!