How to plot lines for variables changing in a loop

Hi,

I have this data set. I want to make line plots for all the particle trajectories. This is the code so far.

%make structure array file

opt = {'MultipleDelimsAsOne',true};
out = {};
[fid,msg] = fopen('dataset.txt','rt');
assert(fid>=3,msg)  %Throw error if condition false
while ~feof(fid)    %while loop to repeat when condition is true. feof-read and display one line at a time until you reach the end of the file. ~ Logical NOT
    str = fgets(fid);   % read line excluding newline character
    val = sscanf(str,'time%f');  % read formatted data from strings
    if numel(val)                 %returns the number of elements in array val
        hdr = regexp(fgets(fid),'\w+','match');  %returns the starting index of each substring of fgets(fid) that matches the character patterns specified by the regular expression
        fmt = repmat('%f',1,numel(hdr));  %Repeat copies of array
        tmp = textscan(fid,fmt,opt{:});   %Read formatted data from text file or string
        tmp = cell2struct(tmp,hdr,2);   %Convert cell array to structure array - structArray = cell2struct(cellArray, fields, dim)
        tmp.time = val;
        out{end+1} = tmp;   %{end+1} assigning a value to the next position, which automatically extends the array to fit that size.
    end
end
fclose(fid);
out = [out{:}]; % All structures must have the same fields!

%----------------------------------------------------------------------------------------
% Make trajectory plots.

figure; axis square; hold on;
set(gca,'XLim',[-0.02 0.02], 'YLim', [-0.02 0.02]);

numsteps=4; 
for frameNr = 1:numsteps
  cla; 
    for i=1:50
       plot(out(frameNr).x(i),out(frameNr).y(i),'*'); 
    end      
    %lineplot
    %?
      % Get the frame for the animation.
  frames(frameNr) = getframe;
     
    
end 

How can I plot lines for each particle trajectory here. Thank you very much.

[Walter Roberson]

See animatedline() -- one such object per particle.

[S]

Hi,

How can I add 50 animated line?

Thanks

[Walter Roberson]

%initialize
for i = 1 : 50; AL(i) = animatedline(nan,nan, '-*'); end

for i=1:50
       addpoints(AL(i), out(frameNr).x(i), out(frameNr).y(i));
end
drawnow()