random selection from 5 different vectors

I have 5 vectors, from which I would like to extract 6 variables that should be i.i.d (Indipendent and Identically Distributed).

A = [1;2;3;2];            % 4x1
B =[4;5];                 % 2x1
C = [7;8;9];              % 3x1
D = [0;1;2];              % 3x1
P = linspace(0,1,101);    % 101x1

I want to extract (following the same uniform randomly distribution) 1 variable from A, from B, from C and from D, and 2 variables from P.

To use the same distribution and have a i.i.d set, I think that I need to use the same random function like 'rand' or 'randi' just one time on the overall vectors, but I do not know how to do it.

Someone can help??

Answer 1

[Stephen23]

C = {[1;2;3;2],[4;5],[7;8;9],[0;1;2],linspace(0,1,101)};
V = {1,1,1,1,2};
F = @(v,n)v(randi(numel(v),1,n));
Z = cell2mat(cellfun(F,C,V,'uni',0))

Z = 1×6

2.0000 4.0000 9.0000 2.0000 0.2300 0.7700