how to select the sample

Suppose i have a matrix:

z=[1;2;3;4;5;6;1;9;10;32;21]

from the above matrix how can i select first 7 sample? Please help....

Answer 1

[Azzi Abdelmalek]

z=[1;2;3;4;5;6;1;9;10;32;21]
z(1:7)

Read http://www.mathworks.com/help/matlab/math/matrix-indexing.html

Answer 2

[Benjamin Avants]

samples = z(1:7)