Cannot understanding the dimension of XY1

clear
clc
t = 0: 0.01 : 2;
omega_n = 10;
omega = 0:0.1:20;
r = omega/omega_n;
XY1 = sqrt((1+(2*zeta1*r).^2)/((1-r.^2).^2+(2*zeta1*r).^2))

XY1 = 0.4739

plot(r,XY1)

I cannot understand why the XY1 does not have same dimension as r has.

Could you explain why and fix the codes to plot the r vs XY1 graph?

Answer 1

[Torsten]

omega_n = 10;
omega = 0:0.1:20;
zeta1 = 1.0;
r = omega./omega_n;
XY1 = sqrt((1+(2*zeta1*r).^2)./((1-r.^2).^2+(2*zeta1*r).^2));
plot(r,XY1)

[SeungHyun Cha]

./ !!!! Thanks!