How do I take specific data from an array?

I have 50 different on column vectors, each defined at t0 through t49. I need to be able to use the data at a certain point from each vector, but the problem is the data I want is not going to be in the same row for all 50 vectors. I want to tell it to start reading when t(i+1)<ti for every file but I'm not sure how to run a loop to do this 50 different times.

[Kirby Fears]

Are these 50 column vectors already loaded into matlab memory? Are they 50 separate arrays, or is this a single table?

[Kristen Brusich]

they are 50 separate arrays already loaded into matlab

Answer 1

[Kirby Fears]

For an Nx1 array V, you can contract V based on any conditional test such as the one you described. For example:

 >> V=1:10;
 >> V=V(V>5);

 >> disp(V)
      6     7     8     9    10

You should be able to use this kind of logic in a loop by applying your loop index.

[Kristen Brusich]

Okay, I understand that but now how do I make that into a for loop to run each manifold?

[Kirby Fears]

Kristen,

I was going to ask for more information, but I see it's in your other question posted here.

I commented on your other question to help you get your vectors into a single cell. It's very easy to loop over a cell containing vectors to apply your logical statement to it.

C={1:10,1:20,1:7}; % sample cell of vectors
for iter=1:numel(C),
    tempidx=C{iter}>5;
    C{iter}=C{iter}(tempidx);
end,

Remember to accept my answer (and Walter's answer in your other post) if your questions have been answered.

Hope this helps.