addition , subtraction
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[EDIT: 20110519 14:45 CDT - reformat - WDR]
Hi, I need help in coding the following example.. thanks
S is (mXn) matrix and d is (mX1) array
S(1,:) = [0 0.2 0.3 0.5 0.6 0.7 0.72 0.75 ...... 1 ]
for example length(S(1,:)) = odd (lets say 7)
d(1)= S(1,1) + (S(1,3)-S(1,2))+(S(1,5)-S(1,4))+(S(1,7)-S(1,6))
...and so on...
if length(S(1,:)) = even(lets say 8)
d(1)=S(1,1) + (S(1,3)-S(1,2))+(S(1,5)-S(1,4))+(S(1,7)-S(1,6))
i.e. neglect S(1,8)
I want to run this program in a loop for entire S matrix and find the array d
采纳的回答
Walter Roberson
2011-5-19
d = Sum(S(:,1:2:end),2) - Sum(S(:,2:2:end-1),2)
2 个评论
Andy
2011-5-19
Ninja'd! Walter, you need lower case sums.
Walter Roberson
2011-5-19
Good point, Andy. I've been flipping between programming languages too much.
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2011-5-19
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