Vectorize sum of discount rates

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Sargondjani
Sargondjani 2012-12-6
Hi,
I want to vectorize the calculation of series like this: [R^0;R^0+R^1;R^0+R^1+R^2;...etc.
Im quite sure this should be easy, but i cant figure it out. Any help is greatly appreciated! :-)

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采纳的回答

Matt Fig
Matt Fig 2012-12-6
R = 5;
cumsum(R.^(0:4))

更多回答（3 个）

Matt J
Matt J 2012-12-6
编辑：Matt J 2012-12-6
out=1/(1-R).*(1-R.^(1:n));
Jan
Jan 2012-12-6
R = 23;
n = 100;
x = repmat(R, 1, n);
x(1) = 1;
Result = cumsum(cumprod(x));
Sargondjani
Sargondjani 2012-12-6
thank you all for you answers... all did what i wanted, but the one by Matt Fig is the most simple

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