plotting the magnitude of a complex fraction

I have a function

H = 1/(1 - 0.5i * exp(-i*2*pi*f)); % In Matlab, f would be defined as: f = 0:0.1:2*pi;

I need to be able to plot the magnitude of H(f) but Matlab won't allow me to define H saying:

%Error using /, Matrix dimensions must agree

What am I doing wrong ?

Answer 1

[madhan ravi]

./

[Maxime Michel]

Could you explain why this works and not the normal divisor symbol ?

[madhan ravi]

doc rdivide

https://in.mathworks.com/help/matlab/matlab_prog/array-vs-matrix-operations.html