I need to plot a graph of P, Rdia and Vo, please help me how to get graph. (for every 10 increment of pressure, there is 1 ohm increment of Rdia , and display the output vo)

Rdia = 3673; % dia resistance value in ohm ;

Rtemp = 3618; % Temperature resistance value in ohm;

R1 = 3600; % fixed resistance in ohm;

R2 = 3600; % fixed resistance in ohm;

Rof1 = 150; % offset compensation resistance in ohm;

Rof2 = 200; % offset compensation resistance in ohm;

Vexc = 0.748; % excitation voltage;

for P = 0:10:300 % pressure increment to 10 mmHg

P

for m =1

if (P == 0)

Rdia_new = Rdia

x = Rdia_new/(Rdia_new+R1);

y = (Rtemp+Rof1)/((Rtemp+Rof1) + (R2+Rof2));

vo = ((x - y)*Vexc)*1000; % output voltage in volts

disp(vo)

else

Rdia_new = Rdia+m

Rdia =Rdia+1;

x = Rdia_new/(Rdia_new+R1);

y = (Rtemp+Rof1)/((Rtemp+Rof1) + (R2+Rof2));

vo = ((x - y)*Vexc)*1000;

disp(vo);

end

end

end

Answer 1

[VBBV]

Rdia = 3673; % dia resistance value in ohm ;
Rtemp = 3618; % Temperature resistance value in ohm;
R1 = 3600; % fixed resistance in ohm;
R2 = 3600; % fixed resistance in ohm;
Rof1 = 150; % offset compensation resistance in ohm;
Rof2 = 200; % offset compensation resistance in ohm;
Vexc = 0.748; % excitation voltage;
I = 1;
m = 1;
for P = 0:10:300 % pressure increment to 10 mmHg
     P;
 
        if (P == 0)
            Rdia_new(I) = Rdia;
            x = Rdia_new/(Rdia_new+R1);
            y = (Rtemp+Rof1)/((Rtemp+Rof1) + (R2+Rof2));
            vo(I) = ((x - y)*Vexc)*1000; % output voltage in volts
%             disp(vo);
        else
    Rdia_new(I) = Rdia+m;
    Rdia =Rdia+1;
    x = Rdia_new/(Rdia_new+R1);
    y = (Rtemp+Rof1)/((Rtemp+Rof1) + (R2+Rof2));
   vo(I) = ((x - y)*Vexc)*1000;
    %disp(vo);
   
        end
 I = I+1;
end
P = 0:10:300 ;
subplot(211)
plot(P,vo);
subplot(212)
plot(P,Rdia_new)

[Supreme H]

thank you sir for your help. but if we execute the code twice. we are not getting linear line. why is it so.

[VBBV]

use clear at beginning of code and run it. Everytime you run, data for variables is created in workspace

clearvars 
%or
clear 

[Supreme H]

thankyou sir it is working fine