Hi Utkarsh,
The error you're encountering in your MATLAB code is due to the misuse of curly braces {} instead of parentheses () for grouping expressions. Curly braces are used in MATLAB for cell arrays, which is why you're seeing an error about array indices needing to be positive integers or logical values.
The code can be modified accordingly as follows:
A = 10^(-4);
l = 250*10^(-6);
g = 0.1517;
e = 0.132205;
d = 0.142;
K = 2.34*10^(-12);
% Corrected use of parentheses
Yr = @(w) w*A*e*(d*(1-K)+g*K) / (l*((1-K)^2 +(g*K)^2));
fplot(Yr, [10,100], "r")
xlabel('Frequency')
ylabel('Conductance')
grid on
I hope this is the output you had in mind.
