how can i write code for animating the plots when i use column vector.

i have two sets of data.

surge amplitude and tension magnitude. the time steps are different but the time for both starts at 0 to 10800 s.

i am trying to have a n animated plot of both data (surge and tension)

[Rik]

Have a read here and here. It will greatly improve your chances of getting an answer.

What have you tried? What is your specific question?

[Iman Ramzanpoor]

Hi,

To animate a plot, I wrote the below code but does not work. I do not know much about MATLAB coding. How can I write a code to animate a multiplot (surge and tension).

t = TIME1;
y = tension;
t2 = TIME2;
y2 = surge;
For k = 1:length(t)
    k2 = 1:length(t2)
    
    %% marker plots
    plot(t(k),y(k),'x')
    hold on
    plot(t2(k2),y2(k2),'o')
    hold on
    
    %% line plots
    plot(t(1:k),y(1:k))
    hold on
    plot(t2(1:k2),y2(1:k2))
    if k ~= length(t)
       k2 ~= length(t2)
        clf
    end
end

Answer 1

[KSSV]

Let (t1,x1) and (t2,x2) be your data. Where x1 is surge and x2 is tension. Both t1, t2 are in same intervel.

First let's get them to same time t1 using interpolation.

x2 = interp1(t2,x2,t1) ; 

Now you can plot them.

for t = 1:length(t1)
    plot(t1(1:t),x1(1:t),'r',t2(1:t),x2(1:t),'b') ;
    drawnow
    pause 
end

You can also use set, this will be the good option. Read about it.

You can save the animation into a gif using this link: https://in.mathworks.com/matlabcentral/answers/94495-how-can-i-create-animated-gif-images-in-matlab

[Iman Ramzanpoor]

thanks,

still have issue. i wrote the way you recommended as below but get error.

t = t1;
y = tension;
t2 = t2;
y2 = surge;
t3 = interp1(t2,surge,t1) ;


    
for t = 1:length(t1)
    plot(t1(1:t),y(1:t),'r',t2(1:t),y2(1:t),'b') ;
    drawnow
    pause 
end

Error using griddedInterpolant

Sample points must be unique.

Error in interp1 (line 170)

F = griddedInterpolant(X,V(:,1),method);

[KSSV]

It seems your t2 data is not unique/ continuous. Attach your data.

[Iman Ramzanpoor]

hi,

thank you very much. please find the attached excel sheet.

[KSSV]

The range of each data is completely different.....

[Iman Ramzanpoor]

the range is the same, but the time step is different. the other way is to animate plot individually. so

if possible, please let me know how to set up animated plot for one then. it would be a great help. i am using column vectors to import the data to MATLAB.

cheers

[KSSV]

for t = 1:length(t1)
    plot(t1(1:t),x1(1:t),'r') ;
    drawnow
    pause 
end

Also have a look on comet.

[Iman Ramzanpoor]

Thanks, it still does not work.

By having the data I have sent to you, how do you write the complete code which creates an animated line of surge or tension.

Answer 2

[Iman Ramzanpoor]

how to slow the speed the animated graph?