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Passing functions with fixed input

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Matteo Tesori
Matteo Tesori 2023-12-29
编辑： Stephen23 2023-12-29
Consider the following function
function f = fun1(x, a)
f = a * x;
end
here x is a scalar variable and a is a scalar parameter. Now consider this second function
function g = fun2(fun)
x = rand;
g = f(x, 1);
end
if we pass @fun1 to fun2, then fun2 evaluates fun1 over the variable x with the parameter a fixed to the value 1.
I'm wondering if it is possible to pass to fun2 the function fun1 with a given parameter a fixed, e.g. a=1.
In my main script I would like to write something like
g = fun2(@fun1(x, 1));
where I'm intending that the first input argument x will be defined inside fun2, while the parameter a is already fixed to the value 1, so that is not necessary to define a inside function fun2

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Stephen23
Stephen23 2023-12-29
编辑：Stephen23 2023-12-29
Ran in:
The MATLAB documentation covers this here:
https://www.mathworks.com/help/matlab/math/parameterizing-functions.html
See also:
https://www.mathworks.com/help/matlab/matlab_prog/anonymous-functions.html
g = fun2(@(x)fun1(x,1))
g = 0.3941
function f = fun1(x, a)
f = a * x;
end
function g = fun2(fnh)
x = rand;
g = fnh(x);
end

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