4 views (last 30 days)

Hi there.I want to draw the following formula, but I get the following error

error: Vectors must be the same length.

why?

y(t) is a 41765*4 matrix and A=y(:,3).

for example y(:,3) having values as follows:

8.26665517322484e-08 - 3.08466436225798e-07i

2.94822110031966e-08 - 1.28642078260667e-07i

4.87811541654193e-08 + 1.34459400745398e-08i

5.20060276867161e-08 - 1.37015907821914e-07i

7.13757345297127e-08 - 2.06148057224859e-07i

8.21435079828878e-08 - 1.73652495134914e-07i

...

And my code in Matlab

tspan = [0 2e-9]; % time interval, up to 2 ns

y0 = [0+eps,0+eps,0+eps,0+eps];

[t,y] = ode45(@rate_eq_program_1,tspan,y0);

size(t);

t=t*1e9;

y = abs(y); % Change As Necessary To Get The Desired Resullt

delta_omega_laser=diff(atan(real(y(:,3))./imag(y(:,3))));

figure(1)

g = plot(t,delta_omega_laser ); % divided to normalize

xlabel('time [ns]','FontSize',14); % size of x label

ylabel('Arbitrary units','FontSize',14); % size of y label

set(gca,'FontSize',14); % size of tick marks on both axis

legend('\delta_omega', 'Location','SE') % legend inside the plot

Thanks in advance for helping!!

M
on 8 Nov 2019

What lines causes the error ? Following one ?

g = plot(t,delta_omega_laser );

t and delta_omega_laser must have the same length.

darova
on 9 Nov 2019

Try:

ylim([-1 1]*2e-7)

I don't know why you don't get the graph you want. I think the problem is deeper than it seems

Results make more sense if plot like this:

plot(real(y(:,3)),imag(y(:,3)),'.-b')

Opportunities for recent engineering grads.

Apply Today
## 2 Comments

## Direct link to this comment

https://nl.mathworks.com/matlabcentral/answers/489978-vectors-must-be-the-same-length#comment_765088

⋮## Direct link to this comment

https://nl.mathworks.com/matlabcentral/answers/489978-vectors-must-be-the-same-length#comment_765088

## Direct link to this comment

https://nl.mathworks.com/matlabcentral/answers/489978-vectors-must-be-the-same-length#comment_765115

⋮## Direct link to this comment

https://nl.mathworks.com/matlabcentral/answers/489978-vectors-must-be-the-same-length#comment_765115

Sign in to comment.