update a matrix as a queue

Hi,

 I would like to create a matrix of size 1000 X 1 . After each sampling period, the latest 100 elements come in and push down all the previous elements. For example:

@ t = 0 M = [a0, a1, a2,..., a998, a999]

@ t = 1 M = [a100, a101, a102,... , a1098, a1099]

Can some one recommend a good way of doing this?

Thank you

Answer 1

[Thorsten]

That's easy: just put the first 900 values of your matrix after the new values:

M = [newvalues; M(1:900)];

Answer 2

[Matt J]

 M(1:100)=newvalues;

 M=circshift(M,[0,-100]);