Adding each row to previous row in a vector-Not Cumulative
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Hi , I've looked everywhere to find the solution for this but I couldn't find the answer. Here 's the problem. How to add each row in a vector with just the previous row? For example here is the process on this vector: A=[2 1 7 9 4] and the answer should be this vector: C=[3 8 16 13]
Thanks in advance.
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Jan
2011-7-20
Easier and faster:
B = A(1:end-1) + A(2:end)
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Sukuchha
2011-7-21
Jan, your method is better ! i feel like stupid now ! I need to remember always solve problems in a simplier way !
Jan
2011-7-21
@Sukuchha: Often a direct translation of the human language is helpful. You've formulated your algorithm very clear already: "add each row in a vector with just the previous row". So you did solve the biggest part of the problem already. Most of the questions in this forum are much less clear.
Paulo Silva
2011-7-20
C=arrayfun(@(x)plus(A(x),A(x-1)),2:numel(A))
or with a for loop
C=zeros(1,size(A,2)-1);
for x=2:size(A,2)
C(x-1)=A(x)+A(x-1);
end
C
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