Adding the values of a vector together and creating a vector comprised of its sums

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Ben Newton
Ben Newton 2020-11-8
评论： Ameer Hamza 2020-11-8
So I have a column vector s, the length of the vector can change and the values inside are randomly either +1 or -1.
for this question lets say that the vector is 3 values long. N = 3 (where N is the number of values in the vector s)
and say our randomised vector gives us
s = [1; 1; -1; ];
what i would like to do is to add the values in the vector together (from left to right order)
and then create a column vector of the values as they are added. so in this example
1 1+1 2+ -1
therefore the column vector should come out as x = [1; 2; 1; ];
Can someone help me do this? Many thanks.

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Ameer Hamza
Ameer Hamza 2020-11-8
编辑：Ameer Hamza 2020-11-8
See cumsum().
s = [1; 1; -1; ];
x = cumsum(s)
Result
>> x
x =
1
2
1

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