sum of dirac delta function

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Dharma Khatiwada
Dharma Khatiwada 2022-4-26
评论： Dharma Khatiwada 2022-4-26
Hi,
I am trying to write a single sum of many dirac terms like dirac(x-1)+dirac(x-4)+dirac(x-7)+dirac(x-10) and so on. There is an increment of 3 in each sucessive term and it can go quite far like 200. Can we write a code that just sums all dirac terms like a series?
Thanks
Dharma
syms x t
y(x) = (dirac(x-1) + dirac(x-4)+................;
z = y(x)* exp(-4*(t-x));

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采纳的回答

Paul
Paul 2022-4-26
Ran in:
syms d(x) t
d(x) = dirac(x);
t0 = 1:3:10; % a couple of terms for example
y(x) = sum(d(x-t0))
y(x) = 

更多回答（1 个）

Chunru
Chunru 2022-4-26
Ran in:
syms x t
y(x) = dirac(x-1);
for i=4:3:200
y(x) = y(x) + dirac(x-i);
end
z = y(x)* exp(-4*(t-x));
y
y(x) = 
z
z = 

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