Home Questions about using Matlab to plot reflection coefficient
 I am trying to use matlab to make a plot to show the reflection coefficient versus load resistance with X-axis 10^x. my code below: x = 1:1000; %define x from 10^0 to 10^3 y = ((x-50)/(x+50)); % this is the reflection coefficient equation semilogx (x,y); % make the x-axis to show 10^0, 10^1, 10^2, 10^3  somehow I got the right Y-axis, and X-axis, but the trace is not showing. I don't know what part I did wrong.