trouble displaying my BPM on the title graph when running the code can someone show me how to do this

clear all
a= arduino('COM3','Uno')
interv=200;
time=1
x=2.0
last=0;
upflag=0;

while(time<interv)
    b=readVoltage(a,'A0');
    x=[x,b];
    time=time+1;
    plot(x,'ro-')
    xlabel('Samples');
    ylabel('Electrical Activity');
    title(sprintf('time=%g[s],BPM= %f',time(end)));
    grid on;
    hold on;
    drawnow

      %highpass filtering
      h=fir1(interv,1/interv*2,'high');
      x_filter=filter(h,1,b );
      plot(x_filter);
      hold on
      %squaring the singal
      detsq=x_filter.^2;
      plot(detsq);
      pulse=zeros(length(detsq),1);

       for i=length(detsq)
          if(detsq(i)>3)
              if(upflag)==0
                  if ( last>0)
                      interv=200;
                      time= i-last;
                      p= interv/time*60
                      pulse(i)=p;
                  end
                  last = i;
              end
              upflag=100;
          else
              if (upflag >0)
                  upflag=upflag-1;
              end
          end
       end  
  end

[Walter Roberson]

This looks to be the same as https://www.mathworks.com/matlabcentral/answers/405983-how-can-i-display-on-a-figure-s-title-block-data-as-the-code-is-running-i-was-able-to-do-it-for-tim which is waiting for a response from you.