EULER'S METHOD FOR 2ND ODE

I can't figure out why I am not getting a numerical solution and consequently a graph for the my code:

t0 = 0;

t = 5;

h = 0.1;

N = (t-t0)/h;

T = [t0:h:t]';

Y = zeros(N+1,1);

Y(1) = 3;

%Start of Euler Method

syms Y(t)

E = diff(Y,2) + .1*diff(Y) + .3*Y == .02*Y^3;

V = odeToVectorField(E)

Y = sym(zeros(size(t)));

for i = 1:N

P = V(2);

Y(i+1) = Y(i) + h*P;

S = Y(i+1)

end

figure(2)

plot(T,Y,'-o')

this is the error im getting;

Error using plot

Data must be numeric, datetime, duration or an array convertible

to double.

Error in Euler (line 21)

plot(T,Y,'-o')