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How to write delta in matlab?

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SZ N
SZ N 2020-10-16
回答： Walter Roberson 2023-10-24
x2[n]= 2delta[n] - u[n - 1] + u[n - 3]
How to I type this in matlab? Like what is the syntax for delta in matlab?

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回答（2 个）

madhan ravi
madhan ravi 2020-10-16
Walter Roberson
Walter Roberson 2023-10-24
Ran in:
Like what is the syntax for delta in matlab?
MATLAB does not have the delta operator. The suggested dirac() does not work for this purpose:
n = [-1 0 1]
n = 1×3
-1 0 1
dirac(n)
ans = 1×3
0 Inf 0
dirac(sym(n))
ans = 
but your delta function should be 1 at parameter 0.
You need to define it yourself, such as
delta = @(x) double(x==0);
delta(n)
ans = 1×3
0 1 0

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