How to speed up the while loop?

I have this while loop in the matlab when I try to run the code it is taking forver to run it.

[per isakson]

Did you intend to write

while t_i < Tmax    

rather than

while t < Tmax    

[Anjani]

I tried that as well but still it takes forever to run

[Matt J]

What does the profiler say?

[Anjani]

It does not end so it hard to tell... like it keeps running and i have to stop the run.

[per isakson]

You haven't provided information enough for us help. Proposal

• See Profile Your Code to Improve Performance
• Upload a code that shows the problem and that we can run. (Formatted text, not an image)
• "stop the run" and run profile viewer

[Anjani]

I have uplaoded the text file of the code. So basically we had to create the subroutine files to calculate the A and B matrix and the Force as 2x1 vector

Answer 1

[per isakson]

You didn't test the code before uploading!

I modified the input lines

z = 1; % input('Enter zeta, z = ');
w = 1; % input('Enter omega, w = ');
dt = 0.1; % input('Enter delta_t,dt = '); 
Tmax = 10; % input('Enter T_max, Tmax = ');

Added

t_i = t;

before the while-loop. And commented out

% Excit;

since it only contained comments. And modified the last statement in the while-loop

t_i = t_i+dt; 

Now it runs in no time

>> tic, main, toc
Elapsed time is 0.005256 seconds.

[Anjani]

As part of the assignemtns we have to add the values for w,z, and dt in the command line since it will change in the future. This is the first time I did the coding so I am pretty new to this game.

[per isakson]

"w,z, and dt in the command line" I guess that means you should convert the script to a function, see Scripts vs. Functions.