No line while plotting using "for" command

I was trying to make a plot, but there is no line after I run it. Can anyone help with that?

mu = 0.0000181206; rho = 1.225;
vc= 15; vstall=5; vmax=1;
g=9.81;span= 1;
for w=0.5:1.5:21    
    for c=0.16:0.33:18
        L=w*g;
        S = c*span; 
        AR=span/c;
        Cl3D=(Lift)./(0.5*rho*vc.^2*S);
        Cl2D=(Cl3D)./(0.95*0.9);
        Clmax3D= (Lift)./(0.5*rho.*vstall.^2*S);
        Clmax2D= (Clmax3D)./(0.95.*0.9);
        re=(rho*c*vc)./mu;
        plot(w,Clmax2D);
    end
end

[darova]

Use

plot(w,Clmax2D,'.b');

[Adam]

You are plotting single points at a time, and without a

hold on

instruction, so each will replace the last and you will end up with just a single point.

Nevertheless, plotting like this is very inefficient. You should just store the results from your loop in arrays and then do a single plot instruction after the loop. Even using 'hold on' would not join your dots and would give you a huge number of individual graphics objects instead of just one.

Answer 1

[Subhadeep Koley]

Hi, using hold on you can plot all the points in the figure.

mu = 0.0000181206; rho = 1.225;
vc= 15; vstall=5; vmax=1;
g=9.81;span= 1;
Lift = ones(1,100); % I have used a random data for the variable Lift
for w=0.5:1.5:21    
    for c=0.16:0.33:18
        L=w*g;
        S = c*span; 
        AR=span/c;
        Cl3D=(Lift)./(0.5*rho*vc.^2*S);
        Cl2D=(Cl3D)./(0.95*0.9);
        Clmax3D= (Lift)./(0.5*rho.*vstall.^2*S);
        Clmax2D= (Clmax3D)./(0.95.*0.9);
        re=(rho*c*vc)./mu;
        plot(w,Clmax2D,'*b');
        hold all;
    end
end
hold off;

[Stephen23]

Note that this is quite inefficient.

Much more efficient would be to plot matrices/arrays.

[Subhadeep Koley]

Stephen Cobeldick Yes I agree. This is very inefficient.