How to display result from solve ?

How to display the result form solve ?

x = @(y)(y^2-4); eqn =@(y) x(y)==0; syms y; S = vpasolve(eqn(y),y)


Xr2 = [' R2 =  ',num2str(S(2),16)];
disp(Xr2)

Error using num2str (line 53)
Input to num2str must be numeric.

Answer 1

[KSSV]

iwant = double(S)

[Ole]

char(S(2)) also works

Answer 2

[fred ssemwogerere]

what are you trying to do here?

Xr2 = [' R2 =  ',num2str(S(2),16)];

This should do nicely:

Xr2 = [' R2 =  ',int2str(S(2))];
disp(Xr2)