What is the difference between function and objective function in MATLAB ?

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Johan Johan
Johan Johan 2018-5-4
编辑： John D'Errico 2018-5-4
To know how to applicate the objective function for in a better way,
I want to find the difference between function and objective function, and what is the problems need to use the objective function ?
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Stephen23
Stephen23 2018-5-4
"What is the difference between function and objective function in MATLAB"
Nothing. An objective function is just a function being used in a particular way.

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Torsten
Torsten 2018-5-4
编辑：Torsten 2018-5-4
No difference - "objective function" is just the terminus technicus for the function you want to maximize or mimimize in optimization problems.
Best wishes
Torsten.
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Stephen23
Stephen23 2018-5-4
"But in objective function the function should accept a vector, whose length is the number of independent variables, and return a scalar,and other conditions if specify the type optimization problem"
Functions can have many different kinds of inputs and outputs. Those are the requirements for a function if you want to use it as the objective function for some optimization routine.
John D'Errico
John D'Errico 2018-5-4
编辑：John D'Errico 2018-5-4
An objective function ia still JUST A FUNCTION. That it is called an objective function is just a name. It is the function that an optimizer like fminunc will try to minimize, thus it provides the objective for the optimizer.
Shakespeare said it this way:
What's in a name? That which we call a rose By any other word would smell as sweet

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