How to construct an array of incrementing subsets in Matlab

Question

In Matlab, say you have a large vector X

X = [1 2 3 4 5 6 ... 1000]

How would you select an array of K element subsets with incrementing indices? (No for loops please).

k = 100; % 100 element subsets
Y = foo(X,k);

>> Y = 
        1   2   3 ... 100
      101 102 103 ... 200
      201 202 203 ... 300
       .   .   .  ...  . 
       .   .   .  ...  .
       .   .   .  ...  .
      901 902 903 ... 1000

Thanks

-----Update--------

Thanks for the quick reply. I hate it when ask stupid questions.

Now, I have a more challenging one (what I really wanted to know). Given:

X = [1 2 3 4 5 6 ... 1000];
k = 900;

How do you produce?

Y = foo(X,k);

>> Y = 1   2   3 ... 900
       2   3   4 ... 901
       3   4   5 ... 902
       .   .   . ...  .
       .   .   . ...  .
       .   .   . ...  .
      100 101 102... 1000 

Thanks again

Answer 1

Very easy: use reshape:

X = 1:1000;
k = 100;
Y = reshape(X,k,[]).';

Or, if you have the Communications Toolbox, you can use vec2mat:

Y = vec2mat(X,k);