How can I convert handle function to a string

I need to convert handle function to string to passed it to function solve which taken string expression the handle function is some thing like

f=@(x) 2*x+1

I tried >>func2str(f) and then solve(f)

but I get an error

[Dyuman Joshi]

Obviously note - Quite a late response.

Idk which version of MATLAB you were or are using, but in the newer versions you can try this -

f=@(x) 2*x+1

f = function_handle with value:
    @(x)2*x+1

eqn = str2sym(func2str(f))

eqn = 

solve(eqn)

ans = 

Also, if it is a function of a single independent variable, you can use fzero

Answer 1

[Walter Roberson]

f=@(x) 2*x+1

f = function_handle with value:
    @(x)2*x+1

syms x
solve(f(x))

ans = 

Answer 2

[Arnaud Miege]

You can do char(f) but I don't think this will work with solve, unless you remove the '@x' from the string.

Arnaud

[Walter Roberson]

Yes, Eman's difficulty (shown in another thread) is in failing to strip out the '@(x)' -- code that Oleg (I think it was) already provided.

[Eman Ahmed Elsayed]

so how can I remove @(x) from the function

[Eman Ahmed Elsayed]

believe me oleg code doesn't work with me

[Matt Fig]

f=@(x) 2*x+1;

str = strrep(char(f),'@(x)','')

[Oleg Komarov]

@Eman: then provide the whole code that fails with the solution I proposed

Answer 3

[Marco Cordero]

This is way way too late to answer but for anyone searching for answers that stumbled upon this question, you might want to try the inline function. As of today, its usage it's no longer recommended and anonymous functions are the preferred method, however, it might come in handy regardless of this.

[John D'Errico]

Um, inline is so old. It has been deprecated, and will probably disappear one day. inline functions are very slow. MUCH slower than a function handle. Since a function handle will work, as long as you understand them, there is no need for an inline function, unless you are stuck with a 20 year old release of MATLAB.