take three matrices into a single matrix

i have three matrix each of size 1*100 how can i take it to a single matrix of 3*100

Answer 1

[jonas]

A=[a1;a2;a3]

a1 through a3 are single line vectors

Answer 2

[Alex Fratila]

Let's say your matrices are named a, b, and c. Then, you can concatenate them like this:

newMatrix = [a ; b ; c];

The semicolon stacks your matrices on top of each other (vertical concatenation). Here is a page with more info!