MATLAB: I got the error “Undefined operator ‘*’ for input arguments of type ‘function_handle”

function handle

My code:
f=@(x)x+1
g=@(x)x*f+4
g(1)

Best Answer

You need to call the function f, like this:
g=@(x)x*f(x)+4
f is a function handle, not a numeric value. Function handles cannot be multiplied. Only when you call the function handle with its input does it return a numeric value, which can then be multiplied.
This is just like any other function in MATLAB:
5*sin     % error, because sin is a function not a value
5*sin(pi) % okay, the function sin returns a numeric value
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