How to input a function into a function?

I wrote a matlab function fun1 and fun2

and when I included them as inputs in third function fun3 that I wrote, it gives an error - not enough input arguments.

Answer 1

[michio]

Have you tried using funtion handles? You can use them as inputs instead of directly using function names.

https://www.mathworks.com/help/matlab/matlab_prog/creating-a-function-handle.html

[michio]

The function handles are variables, so you can save them in a mat file if you need to but you can just define them before calling fun4. If you are running fun4 in a command window then

 f1 = @fun1;
 f2 = @fun2;
 f3 = @fun3;
 fun4(f1, f2, f3)

I suppose here that fun1 to fun3 are already defined.

[Cantor Set]

II want to nest m-files functions into an m-file function and then run the it.

The idea of function handles didn't work :(

[michio]

Hm, I apologize that I haven’t given you a suitable example that suita your case, but those functions (fun1-fun3 above) can be defined as separate m-files or as subfunctions, or as nested functions. There should be a way to make it work :)

Could you give me more detailed info? Such as sample code or.. anything that explains your situation.