How to plot a symbolic function?

Hey guys,

I would like to plot the following integral of a symbolic function:

beta_hat = 4.2915822 
B_hat = 1861.6186657 
C_hat = 58.9848692 

syms t 
y(t) = (exp(-B_hat/((heaviside(t)-heaviside(t-2000))*(330)+(heaviside(t-2000)-heaviside(t-3000))*(350)+...
    (heaviside(t-3000)-heaviside(t-14000))*(390))))/C_hat;

I_new = int(y,t,[0,t])
f_new = (beta_hat*y(t).*(I_new(t)).^(beta_hat-1)).*exp(-((I_new(t)).^beta_hat))
ezplot(f_new,[0,4000])

But it doesn´t work. Does anybody have an idea, why?

[Walter Roberson]

http://uk.mathworks.com/matlabcentral/answers/264762-how-to-multiply-function-handles#comment_337035

[Walter Roberson]

You might need to

ezplot(matlabFunction(f_new),[0, 4000])