Plotting with different isotherms

%Tc = input('PLease enter the critical temperature'); %Critical Temp. in Kelvins
Tc = 154.6;
%Pc = input('Please enter the critical pressure'); %Critical Pressure in MPa
Pc = 5.046;
%omega = input('Please enter the omega value of the Peng_robinson EOS'); 
omega = 0.021;
k = 0.37464 + (1.54226 - 0.26992*omega)*omega;
R = 0.000008314; %gas constant in MPa*m3/mol*K
%v = input('Please enter a vector of pressure');
v = [0.1 0.2 0.5 1 2 3 4 5 6 7 8 9 10];
%n = input('Please enter a vector of temperature');
n = [173 198 223 248 273 298 323 348 373 398 423];
b = 0.077796074*R*Tc/Pc;
for P = v
  for T = n
      alpha = (1 + k*(1-sqrt((T/Tc))))^2;
      a = 0.457235529*(R*Tc)^2/Pc*alpha;
      B = b*P/(R*T);
      A = a*P/((R*T)^2);
      ZZ = ZZroot(A,B);
      ZZ = max(ZZ);
      V = ZZ*R*T/P;
      x = [V];
      y = [P];
      [X,Y] = meshgrid(x,y)
  end
end

ZZroot is a user defined function to find the roots of the polynomial. These are my data for example: at T = 173: with P= 0.1 we have V = 0.0143 P= 0.2 -> V = 0.007 and so on. Then comes another Temperature(isotherm): with a similar manner.

My question is how to plot these isotherms in one graph with X axis as the volume and Y as the pressure(which is the range given as a vector above).

Any help is appreciated.