"Unrecognized function or variable" error when using fminbnd on an anonymous function

Any time I call an anonymous function in fminbnd, an error is returned, particularly with this code:

f=@(x) x^3;
g=@(x) 4*cos(x);
h=@(x) 6*exp(g(f(x)));

fminbnd(@h, -10, 10)

The error is:

Unrecognized function or variable 'h'.
Error in fminbnd (line 233)
x= xf; fx = funfcn(x,varargin{:});
Error in Homework8 (line 25)
fminbnd(@h, -10, 10) 

If I copy the code and paste it into its own function file and then try to use fminbnd, it works as intended.

Answer 1

[Cris LaPierre]

Here, h is already defined as a function handle, so the '@' is not necessary, and is in fact causing the error.

Try this.

f=@(x) x^3;
g=@(x) 4*cos(x);
h=@(x) 6*exp(g(f(x)));

fminbnd(h, -10, 10)

ans = -7.2440

Answer 2

[Steven Lord]

h is already a function handle, there's no need to try to make it one again.

f1 = @sin; % Regular function handle
f2 = @(x) x.^2; % Anonymous function (also a function handle)
h = @(x) f1(x)+f2(x); % Another function handle
fminsearch(h, pi/2)

ans = -0.4501

[REMYA R suresh]

Error in cuu (line 24)

fx=fns(nest);

how to rectify this error ?

[Torsten]

Difficult to say without your code.