Why sometimes a matlab function is called without input arguments?

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Hi,
I have seen that matlab function like this
function dx = some_name(x, u, p)
is called as following
model = @some_name;
I couldn't understand why it is called without input arguments and how the results will be.

Accepted Answer

Stephen23
Stephen23 on 28 Jan 2022
Edited: Stephen23 on 28 Jan 2022
"I have seen that matlab function like this function dx = some_name(x, u, p) is called as following model = @some_name;"
That syntax does not call the function.
A function handle creates an object which can be handled just like any other object (e.g. a numeric array, cell array, graphics object, etc.), e.g. passed as an input/output argument or within a function or script. It can be evaluated when required, just like the original function:
fnh = @sin;
fnh(pi/4)
ans = 0.7071
  1 Comment
Steven Lord
Steven Lord on 28 Jan 2022
One metaphor for a function handle is that of a phone number. If I want to talk to you while you're in the same room as I am, I can do so directly. If you're not in the same room as I am, I may not be able to talk to you directly. But if I have your phone number, I can call you up and talk to you (basically) wherever you are.
You can execute a function in MATLAB directly or you can "call it on the phone" via its function handle and execute it that way. Using the @ operator is like writing down the function's phone number on a piece of paper. Your phone number on a piece of paper isn't you, but it's a way to contact you.

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