Implicit derivative with Matlab symbols

Is it possible to have MATLAB do implicit differentiation with its symbols? I have the following code

    syms x;
    y = symfun(sym('y(x)'), sym('x'));
    yPrime = symfun(sym('y+(2*x)-1'), [sym('x'), sym('y')]);
    diff(yPrime, x, 1)

From this I get

    ans(x, y) =
    2

but what I want to get (in some form) is

    ans(x, y) =
    dy/dx + 2

Is that possible?

[Walter Roberson]

Which MATLAB version are you using?

[Vyas Ramasubramani]

I figured out the problem, it was not related to the version. My issue twofold: first, when I create yPrime I'm declaring it as a function of sym('y'), which redeclares y as a different variable from the prior y(x); and second, in my actual function definition I needed to make it y(x)+2*x-1 instead of just y+(2*x)-1

[Walter Roberson]

The MATLAB version does matter because the way to write your code cleanly would depend upon how old your MATLAB is.

Answer 1

[Vyas Ramasubramani]

I figured out the problem, it was not related to the version. My issue twofold: first, when I create yPrime I'm declaring it as a function of sym('y'), which redeclares y as a different variable from the prior y(x); and second, in my actual function definition I needed to make it y(x)+2*x-1 instead of just y+(2*x)-1