how to make a matrix

hallo,

i have a vector V = (a1, a2, ....., a5000) and i want to make a matix (2*2*5000) with the values [(a1 a1

a1 a1); ....... ;(a5000 a5000 a5000 a5000)]?

thanks

Answer 1

[Walter Roberson]

repmat(reshape(V, 1, 1, []), 2, 2, 1)