How to use kroneckerdelta in programming

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YOGESHWARI PATEL 2016-12-16

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https://ww2.mathworks.cn/matlabcentral/answers/317139-how-to-use-kroneckerdelta-in-programming

编辑： KSSV 2016-12-17

I want to use the Kroneckerdelta function in my programming.I also check the syntax for it. It is given as kroneckerDelta(m,n).But when i used this syntax in my programming it is showing error Undefined function 'DiracDelta' for input arguments of type 'double'.What does it mean?

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KSSV 2016-12-16

What version of MATLAB you are using? Does help Kroneckerdelta gives details about the function?

John D'Errico 2016-12-16

See my answer...

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Answer 1

John D'Errico 2016-12-16

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https://ww2.mathworks.cn/matlabcentral/answers/317139-how-to-use-kroneckerdelta-in-programming#answer_247439

在 MATLAB Online 中打开

You are doing this:

kroneckerDelta(2,3)
Undefined function 'kroneckerDelta' for input arguments of type 'double'.

As you see, MATLAB fails to work, even though I have the symbolic TB, in the current release. Why does it fail? Because I called it with double precision arguments. That function is part of the symbolic TB. In order for it to work, the arguments (at least one of them) must be symbolic.

kroneckerDelta(sym(2),3)
ans =
0

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Answer 2

KSSV 2016-12-16

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https://ww2.mathworks.cn/matlabcentral/answers/317139-how-to-use-kroneckerdelta-in-programming#answer_247441

编辑：KSSV 2016-12-17

在 MATLAB Online 中打开

You can also write your own function, without syms...

function d = kronDel(j,k)
if j == k
    d = 1;
else
    d = 0;
end

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YOGESHWARI PATEL 2016-12-16

sir you ask me calculate the value of Kroneckerdelta function separately.But my Kroneckerdelta is in for loop.So whether this will give me the correct value after each loop calculation.

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