Two graphs at the same time

PLEASE HELP

Hello,

I have this code that is used with arduino package

the code will be used to get data from two sensors:

1. load cell that measures load
2. displacement sensor that measures displacement

problems:

1. this code is showing two graphs but only one graph has labels
2. only one graph is showing data results

this is the code: (please note that i'm new to MATLAB and coding in general)

clear
clc

a=arduino('com3','Uno')
loadcell=addon(a,'ExampleAddon/HX711',{'D2','D3'})

plotTitle1 = 'Load VS Time';
xLabel1 = 'Elapsed Time (s)';
yLabel1 = 'Load (KN)';
legend1 = 'Load Cell 1'

plotTitle2 = 'Displacement VS Time';
xLabel2 = 'Elapsed Time (s)';
yLabel2 = 'Displacement (mm)';
legend2 = 'Displacement Sensor 1'

yMax1  = 10000000
yMin1  = 0

yMax2  = 10000000
yMin2  = 0

plotGrid = 'on';

min1 = 0;
max1 = 10000;

min2 = 0;
max2 = 10000;

delay = .001;

time = 0;

data1 = 0;
data11 = 0;
data12 = 0;

data2 = 0;
data21 = 0;
data22 = 0;

count = 0;

subplot(2,4,1)
plotGraph1 = plot(time,data1,'-r')
subplot(2,4,2)
plotGraph2 = plot(time,data2,'-r')

hold on

title(plotTitle1,'FontSize',5);
xlabel(xLabel1,'FontSize',5);
ylabel(yLabel1,'FontSize',5);
axis([yMin1 yMax1 min1 max1]);

title(plotTitle2,'FontSize',5);
xlabel(xLabel2,'FontSize',5);
ylabel(yLabel2,'FontSize',5);
axis([yMin2 yMax2 min2 max2]);

grid(plotGrid);
tic

while ishandle(plotGraph1)
        dat1 = read_HX711(loadcell)-1940.225269
        count = count + 1;
        time(count) = toc;
        data1(count) = dat1(1);
        
        set(plotGraph1,'XData',time,'YData',data1);
        axis([0 time(count) min1 max1]);
        pause(delay);
        
        
end
hlod on
while ishandle(plotGraph2)
        dat2 = readVoltage(a,'A0')*80
        count = count + 1;
        time(count) = toc;
        data2(count) = dat2(1);
        
        set(plotGraph2,'XData',time,'YData',data2);
        axis([0 time(count) min2 max2]);
        pause(delay);
end 

delete(a);
disp('Plot Closed and arduino object has been deleted');
hold on 
        

[Hans123]

% Would fix problem 1

clear
clc
a=arduino('com3','Uno')
loadcell=addon(a,'ExampleAddon/HX711',{'D2','D3'})
plotTitle1 = 'Load VS Time';
xLabel1 = 'Elapsed Time (s)';
yLabel1 = 'Load (KN)';
legend1 = 'Load Cell 1'
plotTitle2 = 'Displacement VS Time';
xLabel2 = 'Elapsed Time (s)';
yLabel2 = 'Displacement (mm)';
legend2 = 'Displacement Sensor 1'
yMax1  = 10000000
yMin1  = 0
yMax2  = 10000000
yMin2  = 0
plotGrid = 'on';
min1 = 0;
max1 = 10000;
min2 = 0;
max2 = 10000;
delay = .001;
time = 0;
data1 = 0;
data11 = 0;
data12 = 0;
data2 = 0;
data21 = 0;
data22 = 0;
count = 0;
subplot(2,4,1)
plotGraph1 = plot(time,data1,'-r')
title(plotTitle1,'FontSize',5);
xlabel(xLabel1,'FontSize',5);
ylabel(yLabel1,'FontSize',5);
axis([yMin1 yMax1 min1 max1]);
subplot(2,4,2)
plotGraph2 = plot(time,data2,'-r')
hold on
title(plotTitle2,'FontSize',5);
xlabel(xLabel2,'FontSize',5);
ylabel(yLabel2,'FontSize',5);
axis([yMin2 yMax2 min2 max2]);
grid(plotGrid);
tic
while ishandle(plotGraph1)
        dat1 = read_HX711(loadcell)-1940.225269
        count = count + 1;
        time(count) = toc;
        data1(count) = dat1(1);
        
        set(plotGraph1,'XData',time,'YData',data1);
        axis([0 time(count) min1 max1]);
        pause(delay);
        
        
end
hlod on
while ishandle(plotGraph2)
        dat2 = readVoltage(a,'A0')*80
        count = count + 1;
        time(count) = toc;
        data2(count) = dat2(1);
        
        set(plotGraph2,'XData',time,'YData',data2);
        axis([0 time(count) min2 max2]);
        pause(delay);
end 
delete(a);
disp('Plot Closed and arduino object has been deleted');
hold on 
        

[Ameen Mouazzen]

thank you very much for your help.

but this change made all graphs show no results at all

Answer 1

[Yashika]

use 'figure()' when you need further plots in different figure.

for eg,

figure(1)

plot(x1,y1)

hold on;

figure(2)

plot(x2,y2)

hold off

and the remaing thing like axis labels, legends you can write before hold on/off.

[Ameen Mouazzen]

thank you very much.

I tried this but didn't change anything.

I'm sure I did it wrong.

can you please check?

clear
clc

a=arduino('com3','Uno')
loadcell=addon(a,'ExampleAddon/HX711',{'D2','D3'})

plotTitle1 = 'Load VS Time';
xLabel1 = 'Elapsed Time (s)';
yLabel1 = 'Load (KN)';
legend1 = 'Load Cell 1'

plotTitle2 = 'Displacement VS Time';
xLabel2 = 'Elapsed Time (s)';
yLabel2 = 'Displacement (mm)';
legend2 = 'Displacement Sensor 1'

set(gcf, 'Units', 'Normalized', 'OuterPosition', [0 0 1 1]);

yMax1  = 10000000
yMin1  = 0
yMax2  = 10000000
yMin2  = 0

plotGrid = 'on';

min1 = 0;
max1 = 10000;
min2 = 0;
max2 = 10000;

delay = .001;

time = 0;

data1 = 0;
data11 = 0;
data12 = 0;

data2 = 0;
data21 = 0;
data22 = 0;

count = 0;

subplot(2,4,1)
plotGraph1 = plot(time,data1,'-r')
subplot(2,4,2)
plotGraph2 = plot(time,data2,'-r')

hold on

title(plotTitle1,'FontSize',5);
xlabel(xLabel1,'FontSize',5);
ylabel(yLabel1,'FontSize',5);
axis([yMin1 yMax1 min1 max1]);

title(plotTitle2,'FontSize',5);
xlabel(xLabel2,'FontSize',5);
ylabel(yLabel2,'FontSize',5);
axis([yMin2 yMax2 min2 max2]);

grid(plotGrid);

tic

figure (1)
while  ishandle(plotGraph1)
        dat1 = read_HX711(loadcell)-1940.225269
        count = count + 1;
        time(count) = toc;
        data1(count) = dat1(1);
        
        set(plotGraph1,'XData',time,'YData',data1);
        axis([0 time(count) min1 max1]);
        pause(delay);
end

hold on

figure (2)
while  ishandle(plotGraph2)
        dat2 = readVoltage(a,'A0')*80
        count = count + 1;
        time(count) = toc;
        data2(count) = dat2(1);
        set(plotGraph2,'XData',time,'YData',data2);
        axis([0 time(count) min2 max2]);
        pause(delay);
end 

hold off

delete(a);
disp('Plot Closed and arduino object has been deleted');