how to write code for following equation to plot graph for M vs F with respect Q?

 M=(sqrt((1+(1-(F.^-2))).^2+(((3.14).^2/8)*Q*(F-(F.^-1))).^2)).^-1;

this is the equation, which i want to plot.

F (range: 1 to 2 with step size of 0.2) and for different values of Q (range : 1 to 5 with step size of 1).

thank you

Answer 1

[mizuki]

The easiest way is to use double for-loop

q = 1;
M = zeros(5,6);
for Q = 1:1:5
    f= 1;
    for  F = 1:0.2:2
        M(q,f) =(sqrt((1+(1-(F.^-2))).^2+(((3.14).^2/8)*Q*(F-(F.^-1))).^2)).^-1;
        f = f+1;
    end
    q = q+1;
end
figure;plot(M, 'o')

If you care about the speed, vectorize it.

f = 1;q = 1;
F = 1:0.2:2;
Q = 1:1:5;
M = zeros(length(F),length(Q));
[F_mesh Q_mesh] = meshgrid(F, Q);

M =(  sqrt(  ( 1 + (1-(F_mesh.^-2))).^2 + (((3.14).^2/8) *Q_mesh .* (F_mesh-(F_mesh.^-1))).^2)  ).^-1;

figure;plot(M, 'o')

[vijay bhaskar reddy]

i would like to say thank you for your solution, when i run this code it showing M vs Q,but actually i want to plot M vs F.

[mizuki]

Add F as the first argument of plot.

figure; plot(F, M, 'o')