Questions about vectors and matrices

Hi,

So i've saved a bunch of values read from a URL text file. I saved these values in variables called XCX1, XCX2 and XCX3. These register as 168x1 double. Now, im guessing these counts as vectors and I now want to put these together into a 168 row by 3 column matrix.

    pleb=1;
  for j=pleb:1:3

      go=true;
      while go==true
      prompt = 'Mata in vilken månad (månadens siffra) du vill kolla: ';
      M_Start = input(prompt);

      prompt = 'Mata in startdag: ';
      S_dag = input(prompt);

      prompt = 'Mata in slutdag: ';
      E_dag = input(prompt);

      if E_dag - S_dag > 6
          fprintf(2,'\nlorem ipsum\n');
          go=true;
      elseif E_dag - S_dag <= 6
          go=false;
      end
      end

      stuff = ['The URL'];
      timgrejer = urlread(stuff);

      timgrejer_matris = str2num(timgrejer);
      Q_timgrejer_matris = timgrejer_matris(:,5);
      mangd = numel(Q_timgrejer_matris);

      if pleb == 1
          XCX1 = Q_timgrejer_matris;
      elseif pleb == 2
          XCX2 = Q_timgrejer_matris;
      else
          XCX3 = Q_timgrejer_matris;
      end

pleb=pleb+1;

end

Is this possible or am I completely lost?

Answer 1

[Ameer Hamza]

Before for loop

XCX = zeros(3, 168); % pre-allocate an array, it increase speed

Instead of if else structure use

XCX(pleb, :) = Q_timgrejer_matris;

It will assign values to rows of XCX according to the value of pleb.