Plotting multiple figures: one figure doesnt show and the other is wrong

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Rodrigo Blas
Rodrigo Blas 2020-4-10
评论： Rodrigo Blas 2020-4-13
vo=10; %%dm^3/min
T=27+273.15; %%k
p=4; %%atm
R=82060; %%dm^3*atm/(k*mol)
k1=.004; %%(mol/dm^3)^.5*min
k2=.3; %%min^-1
k3=.25; %%DM^3/MOL*MIN
cao=p/(R*T);
ca=linspace(cao,.000005);
rx=k1*ca.^(1/2);
rb=k2*ca;
ry=k3*ca.^2;
sby=rb./ry;
sbx=rb./rx;
sbxy=rb./(rx+ry);
plot(ca,sbx,ca,sby,ca,sbxy)
%%hold on
%%plot(ca,sby)
%%plot(ca,sbxy)
xlabel('Ca')
title('Sb/y,Sb/x,Sb/xy Vs. Ca')
legend({'Sb/x','Sb/y','Sb/xy'},'Location','Southwest')
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David Hill
David Hill 2020-4-10
And sbxy is not a line. Try plotting it all by itself (its amplitude is very small).

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Guru Mohanty
Guru Mohanty 2020-4-13
The three plots are not visible due to following reasons-
  1. The difference between ‘sbx’ and ‘sbxy’ lies in the range of 10-7 . Although there are two different plots but its looks like single due to very less difference in values.
  2. The min to max range of three plots are given as-
The range of ‘sby’ is much higher than that of both ‘sbx’ and ‘sbxy’. This is the reason why the plot sbxy looks like straight horizontal line at Zero, when three are plotted together.
The plotting should be done with different axes.

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