MATLAB: Create an anonymous function after Symbolic differentiation

differentiationfunction handlesymbolicSymbolic Math Toolbox

I want to differentiate a function f and the calculate the derivative of f at value of x. How can I do that? for example:

syms x
f=@(x) x^3+3*x+1;
g=diff(f(x))

Preferably I would like to create a function handle of the derivative and then calculate the derivative at x.

Almost there!

gfun = matlabFunction(g)
g(2)

You didn't assign diff(f(x)) and diff(g(x)) to anything.

Please try use function vpa:

syms x 
f(x) = exp(5*x);
df(x) = diff(f,x);
vpa(f(2))
vpa(df(2))