MATLAB: Can’t draw two plots with animated lines

animated linearduino

I was trying to design a program to receive a data and plot the real time information. This is my first time recording real time information. I needed two plots one with raw data and another with filtered data. But I can't even get the two graph to show the same information. Please help!!!
Error Message: Invalid or deleted object.
Error in trial2 (line 28)
ax.XLim = datenum([t-seconds(15) t]);
My code:
%% Clear all previous information from arduino board:
clc;
clear;
close all;
%% Use the arduino command to connect to an Arduino device.
a = arduino;
writeDigitalPin(a, 'D10', 1);
%% Receiving signal from Arduino and plotting the live data:
figure
h1 = animatedline;
ax = gca;
ax.YGrid = 'on';
ax.YLim = [-5 5];
stop = false;
startTime = datetime('now');
while ~stop
        
    v = readVoltage(a,'A0');
    v2 = readVoltage(a,'A0')-1;
    
    t =  datetime('now') - startTime;
    addpoints(h1,datenum(t),v)
    ax.XLim = datenum([t-seconds(15) t]);
    
    
    subplot(2,1,1)
    xlabel('Elapsed time (sec)')
    title('Raw Signal')    
    drawnow
       
    subplot(2,1,2)
    xlabel('Elapsed time (sec)')
    title('Filtered Signal')
    drawnow
    datetick('x','keeplimits')
    
    
    stop = readDigitalPin(a,'D3');
end

Best Answer

Solved the problem:
figure
subplot(2,1,1)
h1 = animatedline;
ax1 = gca;
ax1.YGrid = 'on';
ax1.YLim = [-5 0];
subplot (2,1,2)
h2 = animatedline;
ax2 = gca;
ax2.YGrid = 'on';
ax2.YLim = [0 5];
stop = false;
startTime = datetime('now');
while ~stop
% Read current voltage value
v = -readVoltage(a,'A0');
v_rms = rms(v);
% Get current time
t = datetime('now') - startTime;
% Add points to animation
addpoints(h1,datenum(t),v)
addpoints(h2,datenum(t),v_rms)
% Update axes
% Update axes
ax1.XLim = datenum([t-seconds(15) t]);
ax2.XLim = datenum([t-seconds(15) t]);
datetick('x','keeplimits')
xlabel('Elapsed time (sec)')
ylabel(ax1,'Voltage (micro-V)')
ylabel(ax2,'Voltage (micro-V)')
title(ax1,'Raw Signal')
title(ax2,'rms signal')
drawnow
% Check stop condition
stop = readDigitalPin(a,'D3');
end
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