basic plotting need help

i have a function;

H = (wo*w)/sqrt(w*w*wo*wo + Q^2*wo^4 + Q^2*w^4-2*Q^2*w^2*wo^2

where;

Q=20;

wo=[7596.4    8394.3];

i create a function for that

function [output]=H(w,wo,Q)
output =(wo*w)/sqrt(w*w*wo*wo + Q^2*wo^4 + Q^2*w^4-2*Q^2*w^2*wo^2);
end

when i try to use function for calculate some values

"Subscript indices must either be real positive integers or logicals."

i got this.

How can i plot this function and whats the mean of that error?

Thanks a lot for your help

Answer 1

[Ahmet Cecen]

This might not be your only problem, but if o0 is a row vector as you wrote there, you have:

 w*w*wo*wo

as a term, where wo*wo is undefined as a vector operation, and also

 + Q^2*wo^4

wo to the power 4 is undefined similarly.

Answer 2

[VBBV]

% syms wo w Q
Q=20;wo=[7596.4    8394.3];w = 10;
K = H(w,wo,Q)

output = 1×2

1.0e+-4 * 0.6582 0.5956

K = 1×2

1.0e+-4 * 0.6582 0.5956

% H = @(wo,w,Q) (wo*w)/sqrt(w*w*wo.*wo + Q^2*wo.^4 + Q^2*w^4-2*Q^2*w^2*wo.^2
plot(K,'-b','linewidth',6)

function [output]=H(w,wo,Q)
output =(wo*w)./sqrt(w*w*wo.*wo + Q^2*wo.^4 + Q^2*w^4-2*Q^2*w^2*wo.^2)
end

Try this