CODEWITHSUNDEEP
matlabplot
Daljeet
Daljeet

Reputation: 1595

Overlapping axes in matlab

I created 2 axes for plotting live EEG signals from a device. And I'm getting 2 signals, one is eegBuffer and another one is FFT.

Here is the code: 

 if eegCounter == 44         
            if plot1

             axes;   
             %subplot(2,1,1);
             time = 0:1/fse:secBuffer-1/fse;
             h1 = plot(time,eegBuffer);
             legend(eegName, 'Location','EastOutside');
             xlabel('Time (s)')
             ylabel('Voltage (uV)')        

             %subplot(3,1,2);
             %time = 0:1/fsa:secBuffer-1/fsa;
             %h2= plot(time,accBuffer);
             %xlabel('Time (s)')
             %ylabel('Acceleration (mG)')
             %legend(h2, accName, 'Location','EastOutside');

             %legend(h2, accName, 'Location','EastOutside');

             %This code deals with fft calculations

            %w = axis;
            %subplot(2,1,2);
            %Fse = 220;
            %T = 1/Fse;
            %time = 0:1/fse:secBuffer-1/fse;
            %x = eegCounter;
            %y = eegBuffer;
            %NFFT = 2^nextpow2(eegCounter);
            %Y = fft(y,NFFT)/eegCounter;
            %f = Fse/2*linspace(0,1,NFFT/2+1);
            %xlabel = ('frequency(Hz)');
            %ylabel = ('|y(f)|');
            %h2 = plot(f,2*abs(Y(1:NFFT/2+1)));

            plot1 = false;

            else
             cell1 = (num2cell(eegBuffer,1))';
             set(h1,{'ydata'},cell1);
             %cell2 = (num2cell(accBuffer,1))';
             %set(h2,{'ydata'},cell2);
             %cell3 = (num2cell(final,1))'; 
             %set(h3,{'ydata'},cell3);
            end

            axes;
            %subplot(2,1,2);
            Fse = 220;
            T = 1/Fse;
            time = 0:1/fse:secBuffer-1/fse;
            x = eegCounter;
            y = eegBuffer;
            NFFT = 2^nextpow2(eegCounter);
            Y = fft(y,NFFT)/eegCounter;
            f = Fse/2*linspace(0,1,NFFT/2+1);
            xlabel = ('frequency(Hz)');
            ylabel = ('|y(f)|');
            h2 = plot(f,2*abs(Y(1:NFFT/2+1)));


            plot2 = false;

            %plot3 = false;



        drawnow;   
        eegCounter = 0;
        end % if eegCounter

Since I'm getting 2 live signals, I'm using 2 axes to plot those 2 live signals. However those axes get overlapped. Here is the screen shot: screen shot

You can clearly see that 2 axes are overlapping. How can I fix it?

Upvotes: 0

Views: 803

Answers (1)

Ander Biguri
Ander Biguri

Reputation: 35525

To create subplots, you need to use the subplot (yeah, Im a bit redundant) function.

You need to call it for each subplot in the following way:

subplot( No. of subplot rows , No. of subplot columns, subplot number)

Therefore if you want to plot 2 things, one in top of the other, you need to call it:

subplot(2,1,1)
% plot you rthings
subplot(2,1,2)
%plot your second things

See documentation for more information

Upvotes: 1

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