loading xn data signals of data.txt

I have a data points in a text document named data.txt. This file contains 1000 data points of random numbers in the form below

0.0773

0.6455

-0.9333

etc.

This data points is called xn if loaded.

The requirement is to find X such that X is a column vector of xn-1 and xn-2. How do I iterate through the data points of xn to get xn-1 and xn-2 and then combine xn-1 and xn-2 to form a colum vector called X. Your suggestions pls

Answer 1

[Rik]

No loops required:

xn=rand(1000,1);%replace this with the code reading your text file
X=[xn-1;xn-2];