Why I got the error "Undefined operator '*' for input arguments of type 'function_handle"?
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Shawn Miller
on 18 Feb 2016
Commented: Dhrumil Patadia
on 25 Jul 2020
My code:
f=@(x)x+1
g=@(x)x*f+4
g(1)
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Accepted Answer
Stephen23
on 18 Feb 2016
Edited: Stephen23
on 18 Feb 2016
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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Dhrumil Patadia
on 25 Jul 2020
In this case what would be the difference between x * f(x) and x .* f(x)?
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