MATLAB: Take each item in a cell array, duplicate it, and rearrange to a longer list in a column vector

Question

I have a cell array: 

A = {a,b,c,d}

I'd like to transpose this into the following format, by specifically duplicating each element x number of times and arranging them as a column

B =

{a,

a,

b,

b,

…}

Answer 1

You may be looking for repelem:

repelem(A, x)'