Is it correct? (dirac delta function)

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MINJEONG PARK
MINJEONG PARK 2020-4-19
回答： Walter Roberson 2020-4-19
Hi. I want to stem this function,
and this is my code.
i wonder it is correct.

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Walter Roberson
Walter Roberson 2020-4-19
no it should be 2*(n==0)
However there is another sense in which dirac(x) should be infinite when x is 0 instead being 1.

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Ameer Hamza
Ameer Hamza 2020-4-19
You code is correct. Another way is to use built-in kroneckerDelta function.
n = sym(-5:5);
xn = kroneckerDelta(n,-2) - 2*kroneckerDelta(n,0) + kroneckerDelta(n,2);
stem(n, xn, 'b', 'filled')
axis([-10 10 -5 5])

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