How to send data to the serial port 3 times

Hello I have to send some data to my arduino. Each line separetly. But It sends me some lines together. So where should I put function fprintf? The data in penultimate example are correct but I have to send each line separetly.

clear all;
clc;
b = Bluetooth('HC-05', 1);
fopen(b);
x=[]; neg = 0;
for a=1:3
neg = neg - 1;
if (neg< -5)
neg = -1; %//wraparound
end
   x = [x; [randi([0 9], 1, 5) neg]]; %//addnewrowofrandomnumbers to x
   a = num2str(x);
   pause(5);
   fprintf(b,a);

disp(a);

end

disp('all data');
disp(a);

Disp(a) in for function

    1  5  4  0  3 -1
    1  5  4  0  3 -1
    1  7  3  5  1 -2
    1  5  4  0  3 -1
    1  7  3  5  1 -2
    6  2  6  6  7 -3

Disp(a) in the end of program

1  5  4  0  3 -1
1  7  3  5  1 -2
6  2  6  6  7 -3

When I have fprintf in for function it show me. First line is correct others not.

0  5  8  6  1 -1

03    54    89    61    18  --12

036      543      891      614      184   ---123

Answer 1

[Walter Roberson]

     a = [randi([0 9], 1, 5), neg];
     x(end+1, :) = a;
     fprintf(b, '%d %d %d %d %d %d\n', a);

[George Francis]

I put it inside for function then behind for fuction. Either way it shows me error: Attempted to access x(4, :); index out of bounds because size(x) = [3,6].

Error in a = x(end+1, :);

[Walter Roberson]

My code does not extract anything from x. My code assigns into x.

[George Francis]

So should I replace this whole part. With your code?

x = [x; [randi([0 9], 1, 5) neg]]; %//addnewrowofrandomnumbers to x
   a = num2str(x);
   pause(5);
   fprintf(b,a);

[Walter Roberson]

Yes, except perhaps the pause(5); I do not know why that is there, but perhaps your situation needs it.

[George Francis]

It shows me same error.

[Walter Roberson]

Replace

   x = [x; [randi([0 9], 1, 5) neg]]; %//addnewrowofrandomnumbers to x
   a = num2str(x);
   pause(5);
   fprintf(b,a);

with

     a = [randi([0 9], 1, 5), neg];
     x(end+1, :) = a;
     fprintf(b, '%d %d %d %d %d %d\n', a);

If that does not work, I need to see the exact error message and the current version of your code.

[George Francis]

I tried that again and it shows me different error and nothing came to Arduino.

Matlab code
  clear all;
  clc;
  b = Bluetooth('HC-05', 1);
  fopen(b);
  x=[]; neg = 0;
  for b=1:3
  neg = neg - 1;
  if (neg< -5)
  neg = -1; %//wraparound
  end
     a = [randi([0 9], 1, 5) neg];
     x(end+1,:) = a;
     fprintf(b,'%d %d %d %d %d %d\n',a);

    end
    disp(a);

Matlab error

4 4 6 7 7 -1
2 6 6 1 1 -2   
Error using fprintf
Invalid file identifier.  Use fopen to generate a valid
file identifier.

Error in test4 (line 13)
   fprintf(b,'%d %d %d %d %d %d\n',a);