how to do sum up elements one by one (sequence addition)

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[1 2 3 4] to [1 3 6 10] i.e 1=1 ; 1+2=3; 1+2+3=6; so on

Answers (2)

halleyhit
halleyhit on 8 Jan 2017
just a hint: [1 3 6 10]'=[1 1 1 1;0 1 1 1; 0 0 1 1; 0 0 0 1]*[1 2 3 4]'

Roger Stafford
Roger Stafford on 9 Jan 2017
cumsum([1 2 3 4]) equals [1 3 6 10]

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