Dynamically creating and calling variables

I am trying to create variable names k1, k2, k3, etc. dynamically, and assign them to a matrix that I create in a function. I struggling with passing the created matrices out of the function localstiff. I tried using varargout to output the matices out of the function, but it didn't work. Also how would I put those then created matrices into a new function, Globalstiff and access those matricies there? I tried accessing these with varargin also with no success. Any help is great!

nom = input('Enter in the number of members >> \n');
nom = [1,nom];

L = [1, 2];
E = [60, 60];
I = [40, 20];

[ k ] =  localstiff( L, E, I, nom);

[ S ] = Globalstiff( k{i} , num);

function [ k ] = localstiff( l, e, j, N )

for i = 1:length(N)

n = N(i);
L = l(:,n);
E = e(:,n);
I = j(:,n);

k = [12 6*L -12 6*L; 6*L 4*L^2 -6*L 2*L^2; -12 -6*L 12 -6*L; 6*L 2*L^2 -6*L 4*L^2];

k = k*(E*I/L^3);
eval(sprintf('k%d = [k]', i));
end
end

function [ S ] = Globalstiff( varargin, num )
%UNTITLED Summary of this function goes here
%   Detailed explanation goes here

b = (num +1)*2;

S = zeros(b);

t = [1;4];
r = [1;4];
for i = 1:length(num)
    k = k{i};
    p = (i-1)*2;
    q = p;
    for j = 1:length(t)
        for g = 1:length(r)
            rk = k(i,j);
            i = i + p;
            j = j + q;
            zo = S(i,j);
            zr = rk + zo;
            S(i,j) = zr;
            i = i - p;
            j = j - q;
        end
    end
end
end

Answer 1

[Stephen23]

https://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-eval