Index exceeds the number of array elements

I have been given the task to create a vector f with 1000 values, logarithmic spaced. The smallest value for f must be 10; the biggest vale for f must be 100000. I have been provided a diagram of a circuit and the following transfer function, H f( ), applies:

f = logspace(10,100000,1000);
w = 2*pi*f
R = 10
L = R/2000*pi
C = 1/2000*pi*R
z1 = 1/1i*w*C
z2 = R + 1i*w*L
H(f) = (z2(f)/(z1(f) + z2(f)))
mod = abs(H(f))

semilogx(f,mod)

I am trying to make a plot of the modulus of the transfer function H f( ) as a function of f . The horizontal scale of the plot must be logarithmic.

The line of code that is giving the the error is H(f) = (z2(f)/(z1(f) + z2(f)))

Can someone please help me understand where im going wrong?

Answer 1

[Sargondjani]

The argument in brackets should be an index number, so for example:

x = 1:10; %a 1 x 10 vector

for ix = 1:size(x,2);

f(ix) = x(ix)^2;

end

Which could be achieved also with .^

f = x.^2;

In your case f is the vector, and consequently all your other variables. To calculate H:

H = z2./(z1 + z2)

modH = abs(H)

[Enrico Robinson]

Thank you for the support you solution has resolved the matter. I completely forgot about the index wise divison (./).