How can i plot graph of the data coming from serial comm

i have try a lot to get plotted the multiple data on graph but was not successfull if any one have a sample program to guide me..

[dpb]

Well, not knowing anything more it's tough...show us what you did try...

[Gaurav Khadasane]

yes sure ..i will b back to you soon..

[Chris Barnhart]

Not sure what the question is. Are you able to receive data from the serial port (and turn it into numbers)? Or is the problem related to plotting?

http://www.mathworks.com/help/matlab/creating_plots/animation-techniques.html

Answer 1

[Gaurav Khadasane]

if true

   s = serial('com4');
%set(s, ‘ Terminator’, ‘LF’); % Default terminator is \n
set(s,'BaudRate', 9600);
set(s,'DataBits', 8);
set(s,'StopBits', 1);
fopen(s);

s.ReadAsyncMode = 'continuous';

% Various variables numberOfDatas = 20;

i = 1; d = 0;

% Main graph figure figure(1); hold on;

% Start asynchronous reading

readasync(s);

while(i<=numberOfDatas)

    if((fscanf(s,'%c',1)) == '#')

        d = [fscanf(s,'%c',3)];
    end

    % Plot the data
    figure(1); 
    subplot(2,2,1);
     plot(i,d,'--rs','LineWidth',2,...
                'MarkerEdgeColor','k',...
                'MarkerFaceColor','g',...
                'MarkerSize',10)
    axis([0 20 0 1000])
    if(i>20)
       xlim([i-10 i]);
       set(gca,'xtick',[i-10 i-9 i-8 i-7 i-6 i-5 i-4 i-3 i-2 i-1 i])
    end

     subplot(2,2,2);
     plot(i, data(i), '*');
     axis([0 20 0 1000])
     hold on;
    if(i>20)
       xlim([i-10 i]);
      set(gca,'xtick',[i-10 i-9 i-8 i-7 i-6 i-5 i-4 i-3 i-2 i-1 i])
    end

      subplot(2,2,3);
      plot(i, data(i), '*');
      axis([0 20 0 1000])
    % Ensure there are always 10 tick marks on the graph
    if(i>20)
       xlim([i-10 i]);
       set(gca,'xtick',[i-10 i-9 i-8 i-7 i-6 i-5 i-4 i-3 i-2 i-1 i])
    end

    subplot(2,2,4);
      plot(i, data(i), '*');
      axis([0 20 0 1000])
    % Ensure there are always 10 tick marks on the graph
    if(i>20)
       xlim([i-10 i]);
       set(gca,'xtick',[i-10 i-9 i-8 i-7 i-6 i-5 i-4 i-3 i-2 i-1 i])
    end

    % Draw and flush
    drawnow;

    %Increment the counter
    i=i+1;

end % Give the external device some time… pause(3);

% Some of these crash the program – it depends. The serial port is left % open, which is not good. %stopasync(s); fclose(s); % bad %delete(s); %clear s; end

in this code i try to plot the 4 subplot but i m not able to get the logic how to distinguish the 4 different data coming from the serial comm and plot it.