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Summing elements of a vector sequentially?

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James
James 2015-5-31
评论： James 2015-5-31
Is there a function that will sum a vector in the following way?
Let x be a 1 x N vector. The ith element of the output vector should be sum(x(1:i)), where i ranges from 1 to N.
I will use a for loop, if I must...
x = 1:100;
output = zeros(1,length(x))
for i = 1:length(x), output(i) = sum(x(1:i)); end
Thanks!

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per isakson
per isakson 2015-5-31
See cumsum

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