Home Limit the value of angle theta in ezpolar plot
 I am trying to plot the function as shown in figure above where the red curve denote for V = 200*1.6*1e-22 and the blue curve denotes for V = 285*1.6*1e-22 clear all close all clc syms phi l = 50*1e-9; D = 200*1e-9; E = 80*1.6*1e-22; v = 1e+6; h = 6.626*1e-34/(2*pi); V = 200*1.6*1e-22; ky = (2*pi/l).*sin(phi); q_x = sqrt((E - V).^2./((h*v).^2 - ky.^2)); % vpa(q_x,5) T = cos(phi).^2./(1 - cos(q_x.*D).^2.*sin(phi).^2); ezpolar(T)  it works great but i want to show the plot only between the -90 < phi < 90, i tried ezpolar(T,[-pi/2 pi/2]) it gives the plot in region -90 to 90 but the empty region does also appear. How to remove that left half semicircular area where the plot is not there.