how to do logical indexing

I need to plot a graph for that I have two files velocity and time. But I have to plot the graph for certain interval of time, so can you help me how should I get the corresponding velocity points as both the files are in vector form.

Thanks

Answer 1

[Guillaume]

See Using logicals in array indexing. In your case it's going to be something like:

%time: vector of time
%velocity: vector of velocity
intime = time >= starttime & time <= endtime
plot(time(intime), velocity(intime))

[Ryaan Semwal]

Hi,

Thanks for your quick reply. I am new to matlab so I am attaching my script in this comment as I am getting error. I will be thankful to you if you can help me figure out my mistake

Thanks

names = dir('*.smat.mat');
names = {names.name};
for i = 1:length(names) 
    S = load(names{i});

      time_data=S.timezones;
  %     isfield(S,'timeClean')
      whole_time=S.timeClean;
  %     A=sort(velocity_data);
  % %     timepoints=whole_time(whole_time(:,1) >= time_data(1,1) & whole_time(:,1) < time_data(2,1));
      velocity_data=S.VelClean;
  %     velocity_index=(velocity_data>time_data(1,1)) & (velocity_data<time_data(1,1))
      intime=time>time_data(1,1)& time<=time_data(2,1);
      plot(whole_time(intime),velocity_data(intime))
  % end
  end

[Ryaan Semwal]

hi, Figured out the mistake. Thanks a lot for your help.