Is it possible to have your email to ask a few questions? or If I can have the code to understand things better

That Wynaut reference caught me off guard 😅

Error using sym/cat>checkDimensions CAT arguments dimensions not consistent. Error in sym/cat>catMany (line 33) [resz, ranges] = checkDimensions(sz,dim); Error in sym/cat (line 25) ySym = catMany(dim, args); Error in sym/vertcat (line 19) ySym = cat(1,args{:});

It's better if you do a beamer document and then talk using that.

Excellent video! Thanks

Great ode45 tutorial. Thanks for making the video!

Great video, thanks!

Not one of the best; The best tutorial of ode 45 found on KZbin. Thanks 🍻🤝

Really helpful video. Can you repeat the same with python ?. Which will be really beneficial for those who are doing mathematical modelling with Matlab & python.

Lifesaver with these videos man! I'm 5+ years away from using Matlab only primitively and have to solve a 5D system for work!

May I ask some questions by email?

Hi man, please let me know how to compute x''. Extract from Sdot={x',x''}. Sorry my English is not really good if you cant catch my mean.

thank you so much sir you help me

Excellent explanation my friend. Thank you for taking the time to make this!

I am very thankful to you

love how tired you are

Great video, thank you so much for wonderful explanation, and generous details

I've seen several videos but this STANDS OUT!!! Thank you

This is so f'n nice.. Thanx a bunch!! :D

YOU ARE MASTER. YOUR LESSON IS EXACTLY WHAT I NEED. THANK YOU SO MUCH!!

This method only works for linear systems? i.e., the matrices M, C and K MUST BE CONSTANTS right?

I want to become a good programmer like you, give me some suggestions regarding that.

amazing job at explaining! thanks so much

Hi, what do you do if the state vector contains matrix terms like a mass or stiffness matrix?

Hello and thank you for such an informative video! It would be a huge help if you could enlighten me a little bit with the followin issue I have: I want to solve (and sketch the phase portrait) on a system using ode45. The problem I face is that the x2dot = V-4N(x1)-x2 where N(x1) is a piecewise function with N(x1) = x1 when x1< -0.2 or x1 > 0.2 , and N(x1) = a*x1 when -0.2<x1<0.2 . Should I use the events function to run ode45 for each interval or it is correct if I simply write an odefun where I give x2dot values according to x1 values (using IF statements) ? This discontinuity seems to produce odd results and I am somehow lost.

Thank you so much.

pozdro z imiru psycha nie siada nawet na mechanics 2 i control theory fundamentals pozdro

can anyone explain ode for hodgkin and huxley model ? please ..

You should really go into about state vectors, it is so confusing if you skip all those!

could you just define what on earth are state vectors and state variables????

I am fucking lost at the state blahbablh what ever that is

Do you always have to call out the function in the Command Window, or are you able to just hit 'Run' in one of the versions, or set it up such that you can hit 'Run'?

Wonderful explanation. Thank you very much.

for those the second method is not working try this [time, state_values] = ode45(@g,[1,30],[1,0]); x = state_values(:,1); xdot = state_values(:,2); figure(1) plot(time,x) function sdot = g(t,s) % [s] = [s(1) s(2)] = [s1, s2] = [x, xdot] sdot = [s(2); (5- s(2)*sin(t) - s(1)*exp(t))/t^2]; end

This was a very good video. It was exactly what I was looking for!

Thank you very much for the best explation, I need your help please if possible I the extract individual values part when I write ( x = state_values(:1);) I get this message : Invalid syntax at '1' I use all your steps but I stopped in this problem if you want to share the code to verify I will , thank you very much

Man, you are the hero! I have watched so many videos about this, but yours is the only one that lead me to the right direction! Thank you so much!

Very helpful. Thank you sir I will be grateful if you can do state space model for a thermodynamics system

hi there, I would like to know how you can solve your ODE if the forces also depend on the state values? thanks for the videos

Thanks for this video sir, If we have a non linearity in the system then how should i consider my function? Whether the Ode45 solver updates the value for every time interval?

Hey, thanks for making this video ,if possible could you tell me where to find this document?

How would I define a value of xdot at a certain x value as a variable???

hi i'm unable to run first 2 methods in matlab 2017

When you call the numerical integration, you have @trajectory in there, but you don't define sdot = trajectory(t,s) until further down the page? So how does this work or does it search the file for a trajectory function even if it's been stated below? On the previous problems you had the following: % Call ode45 solver [time,state_values] = ode45(sdot,tspan,IC);

good lecture man

Thanks bcp for this video, I would like to know How would you write the code when the stiffness matrix K(t) is time-varying?

It is perfect and helpful. Great thanks

Nice videos! I use Octave instead of Matlab though...

It is fine to understand how the matrix form of the given coupled system equations is obtained. But how matlab coding for this matrix equation will be different from the code for state space form is not clearly captured in the descriptions at hand_vs_matrix file. It will be better if the coding of this m file is scrolled slowly for better understanding.

Really a great video....systematic delivery following the same procedure in all videos by the author...those who had frequent hiccups in converting system equations into state space model...these videos (I mean the other videos too in this line by Samaritan) are the real helpline. By the way it will be better if the author explains about linearization of non linear equations...and this will make procedures to solving system equations (which are practically nonlinear) fully complete.