Solving Linear Programming Problem (LPP) in MATLAB

I have a code for LPP mentioned below, but its showing some error which im not able to retify. Please help me with this.

 function vert = feassol(A, b)

 % Basic feasible solutions vert to the system of constraints
 % Ax = b, x >= 0.
 % They are stored in columns of the matrix vert.

 [m, n] = size(A);
 warning off
 b = b(:);
 vert = [];
 if(n >= m)
 t = nchoosek(1:n,m);
 nv = nchoosek(n,m);
 for i=1:nv
 y = zeros(n,1);
 x = A(:,t(i,:))\b;
 if all(x >= 0 & (x ~= inf & x ~= -inf))
 y(t(i,:)) = x;
 vert = [vert y];
 end
 end
else
 error('Number of equations is greater than the number of
variables.')
end
if ~isempty(vert)
 vert = delcols(vert);
else
 vert = [];
end

I want to run the problem, example : x1 + x2 <= 6, x2 <= 3 and x1, x2 >= 0. The constraint matrix A and the right hand sides b are A = [1 1 1 0; 0 1 0 1]; b = [6; 3]; vert = feassol(A, b)