How to use vectorization to sum every five elements in 100x1 vector?

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mrbond99
mrbond99 2020-6-26
评论： mrbond99 2020-6-27
I have tried this code..
c = (1:100)'; % Dummy data
for n = 1:20 % This one works
m(n) = 1 + (n - 1)*5;
p(n) = 5 + (n - 1)*5;
csum(n,:) = sum(c((m(n):p(n)),:));
end
nn = 1:20; % The vectorization code adds only the first five elements.
mm(nn) = 1 + (nn-1)*5;
pp(nn) = 5 + (nn-1)*5;
ccsum(nn,:) = sum(c((m(nn):p(nn)),:));
The result that I want is the one like csum but for vectorization's result, ccsum is only at the sum of the first five elements in c. Please help..

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采纳的回答

Walter Roberson
Walter Roberson 2020-6-26
csum = sum( reshape(c, 5, []) ).' ;

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