how to do sum up elements one by one (sequence addition)
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回答（2 个）
halleyhit
2017-1-8
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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
2017-1-9
cumsum([1 2 3 4]) equals [1 3 6 10]
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2017-1-9
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