# Matlab How to plot these figures?

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1. Jan 10, 2017

### Nate Duong

Dear group,

I am new with matlab and trying to plot these figure out as the file request.

I tried but could not get the same plot as the file has.

I hope anyone can help. Here is the code which i am working on.

Thank you.
Code (Matlab M):

fc = 553e6;
w   = 0:2*pi*fc*1e-2:100*2*pi*fc;
pau = 0.33;
tau = 0.2e-9; % in nano second

% beta_square = zeros(1,length(w));

beta_square = 1 + 2*pau*cos(w*tau) + pau^2;
theta  = atan(-pau*sin(w*tau)/(1+pau*cos(w*tau)));

figure,plot(w,beta_square)
figure,plot(w,theta)

#### Attached Files:

• ###### plot matlab.pdf
File size:
198 KB
Views:
64
Last edited by a moderator: Jan 11, 2017
2. Jan 11, 2017

### Staff: Mentor

3. Jan 11, 2017

### Dr Transport

your beta_square is not in dB and the angle is not in degrees you will have to convert.

also
Code (Text):
theta  = atan(-pau*sin(w*tau)./(1+pau*cos(w*tau)));
you need a ./ not just / for the division because w is a vector not a scalar.

4. Jan 11, 2017

### Nate Duong

@Dr Transport: oh yeah, I missed that dot, that's why I received only scalar not a vector.
Thank you, for the help.