Is there a Matlab built in function to determine the domain of a function?

Is there a Matlab built in function to determine the domain of a function? A Mathematica variant is FunctionDomain. Does Symbolic Toolbox of Matlab have a similar function?

[Dyuman Joshi]

I don't think the Symbolic Math Toolbox or MATLAB overall has such a function.

Answer 1

[Matt J]

Perhaps you are looking for assumptions?

syms x
assume(x>0);
f(x)=log(x);

assumptions(x)

ans = 

[Dyuman Joshi]

That does not return the domain of a function though.

Answer 2

[Star Strider]

The Symbolic Math Toolbox has the argnames function.

Answer 3

[Walter Roberson]

No, there is no built-in function to do that.