Save values in the middle of a loop

Hello, I'm coding an infinite loop that will be shooting photos every X minutes. The problem is that I need that it save the rows every time it has one, but the program only save in the workspace when the function has finished (I've put only 3 photos for seeing the result). Is there any way to keep updating every 30minutes in the workspace my matrix?

Thanks. Heres is my code:

function CalculaParticulas

vid = videoinput('winvideo', 1,'I420_1280x720');
set(vid,'ReturnedColorSpace','grayscale');

Densidad=1000;
VolumenMAX=pi*1000/(8E18);
VolumenMIN=pi*15.625/(8E18);
Caudal=0.01; %m3/min

i=1;

pause(2);%Dejamos 32 minutos de margen antes de empezar (en segundos)

while (1);

      img{i} = getsnapshot(vid);
      fname = ['img' num2str(i)];%que nombre le ponemos al archivo
      imwrite(img{i}, fname, 'jpg');%guardar el archivo con formato

      pause(2);%paramos 3minutos entre foto y análisis

      img{i} = imread(['img' num2str(i)]);
  %         %imshow(img1)% Si queremos ver la imagen original
      img2{i}=im2bw(img{i},graythresh(img{i}));
      img2{i}=~img2 {i};
      B=bwboundaries(img2 {i});
      NumberOfParticle(i)=length(B);
  %     disp(['Hay ', num2str(NumberOfParticle), ' partículas'])

          %hold on

              %for k = 1:length(B)
                  %boundary = B{k};
                  %plot(boundary(:,2), boundary(:,1), 'g', 'LineWidth', 0.2);
              %end

      Concentracion(i,1)=NumberOfParticle(i)*VolumenMAX*Densidad/Caudal

      Concentracion(i,2)=NumberOfParticle(i)*VolumenMIN*Densidad/Caudal

      Concentracion(i,3)=(Concentracion(i,1)+Concentracion(i,2))/2

% assignin('base','Concentracion',Concentracion);        

      i=i+1;

      pause(5); %esperamos 27'

      if i==3;
          break;
      end

end

Answer 1

[Marta Salas]

You could save them as mat files http://www.mathworks.es/es/help/matlab/ref/save.html