Matrix names within a matrix

So I have a piece of code that generates many matrices: mass, time, gravity, frontal_area etc.. I would like to create a matrix A = [mass; frontal_area] which only contains specific variables. Now if I wanted the value of mass I would type A(1,1) or something to that effect. HELP

Answer 1

[Azzi Abdelmalek]

mass=[1 2;3 4]
front_area=[45 6 77]
A={mass;front_area}

Then type

A{1}
A{2}