How can i transform a symbolic variable to numbers?

I have a matrix in symbolic variable : A=[1 2 3 ; 4 5 6 ;7 8 9]

now I want to transform it to the numerics (a real matrix).

Answer 1

[madhan ravi]

Use subs() and then use double()

doc subs
doc double

[masoud jiryaei]

How?

Can you show me?

[madhan ravi]

syms x y % an example
A = [x+2, 2+y; 3*x*y, 4*y^2]
v = [2,3]
subs(A,{x,y},{v(1),v(2)}) % here's what happens is that x symbolic variable is substituted with 2 and 3 for y