Substitution on symbolic function

I have this program

syms t
x0=input('x0= ');
x1=input('x1= ');
x2=input('x2= ');
y=input('input your function of variable t= ');
fx0=subs(y,t,x0)
fx1=subs(y,t,x1)
fx2=subs(y,t,x2)

But it didn't work. How to use subs in symbolic function. Thanks

Answer 1

[David Hill]

syms t
x0=input('x0= ');
x1=input('x1= ');
x2=input('x2= ');
y=input('input your function of variable t= ');
t=x0;
fx0=subs(y)
t=x1;
fx1=subs(y)
t=x2;
fx2=subs(y)

[Fahmy Shandy]

Ok. Thanks for the answer.