MATLAB: How to display a letter in the same array as a number

asciiformatoutput

I have a 10 by 4 array that has numbers in all four rows right now. However, the fourth row is supposed to be letters. I am plugging in 'Y' and 'N' into the last row, but it changes them to the ASCII codes and returns 89 and 78 respectively.
Here's my code. The file is just a file I have stored on my computer and is not the problem.
   clc; 
   clear;
   Fid = fopen('PA_16_2_1_input.txt','r');
   fgetl(Fid)   % this effectively skips the first line, which has strings
   A = fscanf(Fid,'%6e',[10,inf]);
   fclose(Fid);
   A=A';
   [m,n]=size(A);   % m is the number of columns, n=rows
    i=1;     % iteration count for outer loop (string)
   while i<=n   % this means that the while loop will run n times
             % which is 10 for this loop
       j=1;     % iteration count for inner loop (bulb)
       dumb=0;
       v2=14400; % Voltage squared
       R_tot=0;
      while j<=m
          s=A(j,i);     % get the object from column i, row j
          dumb=dumb+s;
          j=j+1;
          R=v2/s; % Resistance in series is v^2 over power 
          R=R/50;       % divided by number of resistors in the circuit
          R_tot=R_tot+R;
      end
    if dumb>2.6
       w='N';
    elseif dumb<2.2
        w='N';
    else
        w='Y';
    end
    format shortg
    b(1,i)=dumb;
    b(2,i)=R_tot;
    b(4,i)=w;
    i=i+1;
end
disp(b)
The input looks like this.
   2.4093       2.4633       2.7089       2.5957        2.308       2.1984       2.7745       2.3935       2.5827       2.5053
    7.385e+05   1.0249e+06   6.0811e+05   5.9111e+05   5.7985e+05   1.9477e+06   4.3411e+05   3.5391e+06   6.4804e+05   5.1822e+05
            0            0            0            0            0            0            0            0            0            0
           89           89           78           89           89           78           78           89           89           89
The 89's and 78's are the problem. They should be Y and N.
Thank you for your time.

Best Answer

The only way an array can store both numbers and characters is if it is a cell array. Numeric arrays cannot store characters. You could convert the numbers to the equivalent strings and add the characters to that, for display purposes.
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