sum of series

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Nelly
Nelly 2012 年 4 月 11 日
Hello to all I need to calculate the sum of series: S= (Vx+1 - Vx)+(Vx+2 - Vx)+ (Vx+3 - Vx)+ (Vx+...-Vx) while x changes and increases form 1 to 12 x=1:12 How to do it right and elegant? Thanks a lot.

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回答 (2 件)

Richard Brown
Richard Brown 2012 年 4 月 11 日
I think you may need to try and ask your question more clearly. What you've written there reduces to 1 + 2 + 3 + ...
If it's an infinite sum, it obviously diverges, if not it's just n*(n+1)/2
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Image Analyst
Image Analyst 2012 年 4 月 11 日
I think the x+1, x+2 etc. are subscripts (indexes) of his V array.
Richard Brown
Richard Brown 2012 年 4 月 11 日
What we need here is LaTeX markup :)

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Image Analyst
Image Analyst 2012 年 4 月 11 日
Sounds like a homework problem. So you need to look up sum(V(1:12)) or cumsum(V(1:12)) - that should give you a big hint.

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