HELP! I need to plot my values from if statement, and cant figure out how

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if H < 1.5 %Pressure drop is less than 1.5 psi
D = (Qc.^0.381)/(19.17*(H./(Cr.*L))^0.206);
elseif H >= 1.5 %Pressure drop is greater than or equal to 1.5 psi
D = (Qc.^0.381)/(18.93*((P1a.^2-P2a.^2).*Y./Cr.*L)^0.206);
end
xx = linspace(0,2*Qc,1000);
fplot
this is the part of the function that does the calculation and I can't figure out how to plot the D vs. xx
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Answers (1)

Raghunandan V
Raghunandan V on 7 Jun 2019
Hi,
Just a small correction in the code
if H < 1.5 %Pressure drop is less than 1.5 psi
D = (Qc.^0.381)/(19.17*(H./(Cr.*L))^0.206);
else %Pressure drop is greater than or equal to 1.5 psi
D = (Qc.^0.381)/(18.93*((P1a.^2-P2a.^2).*Y./Cr.*L)^0.206);
end
xx = linspace(0,2*Qc,1000);
plot(xx, D)
This is only possible if your xx and D are of same dimention
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