Hi. I am trying to plot function X in matlab

hbar=1.0552e-034; % h/2pi [J.s]
me=0.067*9.11e-31; % electron effective mass [Kg]
L=0.35*10^-9; %Well width

X=(tan(((sqrt(2*me*E))/(hbar))*L))

I want to plot X vs E with E ranging from 0 to 75. Can someone help me with this?

 

Define E=0:0.01:75;

then type your X

X=......;

then

plot(E,X)

 

I tried that but my plot looks like noise rather than a tan function.