MATLAB: String manipulation (adding additional characters and spaces)

manipulationstring

tostr = [3 14; 4 38; 5 25; 15 1; 16 196];
str=num2str(tostr);

How can I modify the above created string 'str' into the following (example for row 1):

'F 3 (n 14) ' (with a space after the last bracket)

and then concatenate the different rows into one single string:

'F 3 (n 14) F 4 (n 38) F 5 (n 25) F 15 (n 1) F 16 (n 196)'

strjoin(compose('F %d (n %d)', tostr))

Here are three possible interpretation of the question.

1. To create one single string, exactly as per the original question:

 >> vec = [18,29];
 >> sprintf('%d',vec)
 ans = 
   '1829'

2. To create a cell array of strings:

>> arrayfun(@int2str,vec,'UniformOutput',false)
ans = 
  '18'    '29'

3. To create a character array with spaces separating the values:

>> int2str(vec) % or num2str
ans = '18  29'

RE = [0.9808 0.488 0.0819 0.11491   0 0 0 0 0 0 0 ]
nonzeros(RE) %removes zeros