Chunking a portion of raw data

Hi, I need a small suggestion. I have to chunk the beginning of a data which is in floating format. As in, my data is abc.dat which is (2198560*1)size. I need to cut the first 143100 samples. Which is the best method?

Also, I need to get two data to the same length.Which is the most effective method to this apart from using MIN function.

Thanks

[per isakson]

"abc.dat" is that a file or a structure?

Answer 1

[Azzi Abdelmalek]

Example

A=rand(2198560,1);
A(1:143100);

%-----------------------

a1=a(1:numel(a)/2);
a2=a(numel(a)/2+1:end)