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Marwan Malaeb

Marwan Malaeb (view profile)

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generate y(n)=y(n-1)+x(n)

Asked by Marwan Malaeb

Marwan Malaeb (view profile)

on 20 Apr 2017
Latest activity Commented on by Marwan Malaeb

Marwan Malaeb (view profile)

on 20 Apr 2017
hello i want to generate y(n)=y(n-1)+x(n). by using a for loop I can find the last value of y, but i need to store all values of y from n =1 till n. Who do I do that?

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2 Answers

Azzi Abdelmalek

Azzi Abdelmalek (view profile)

Answer by Azzi Abdelmalek

Azzi Abdelmalek (view profile)

on 20 Apr 2017
 Accepted Answer

n=10
y0=0; % Initial conditions
y(1)=y0+x(1);
for k=2:n
y(k)=y(k-1)+x(k)
end

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Marwan Malaeb

Marwan Malaeb (view profile)

on 20 Apr 2017
that is right, thanks Azzi.

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Roger Stafford

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Answer by Roger Stafford

Roger Stafford (view profile)

on 20 Apr 2017

That is precisely what the matlab ‘cumsum’ function does:
y = cumsum(x);

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