How can I do this expression

I have two variables 'u' and 's' which are functions of time. I want to plot these variables for the time range of time>=0 and time<=7. The time range of u and s varies within the datafiles. Here is the abridged script script I tried to do

   for ii= length(datafiles);
   subplot(2,3,ii)
      for  time>=0  || time<=7; 
      plot(u,s,'x:')
      end
    end

but I couldn't succeed and am new to matlab . Any help is highly appreciated.

Answer 1

[Image Analyst]

No. You're just plotting the entire array over and over again. Get rid of the "time" for loop and just do

validIndexes = theTimeArray >= 0 & theTimeArray <= 7;
plot(u(validIndexes), s(validIndexes), 'x:');

If your u and s arrays are sampled exactly every second, then you could plot those 8 elements (0, 1, 2, 3, 4, 5, 6, 7) like this:

plot(u(1:8), s(1:8), 'x:');