Adding all previous to create a new row
조회 수: 4 (최근 30일)
이전 댓글 표시
Hello, if i have a row, I want to create a new row, where the first number is the same, the second number is the first and second from previous row. The third number is the first plus the second plus the third from the first row.
for example: x=[10 9 8 7 6 5] then i want the new row to become: y = [10 19 27 34 40 45]
The best I could come up with was:
y=[x]+[0,x(1:end-1)]+[0 0,x(1:end-2)]+....+[0 0 0 0 0,x(1:end-5)]
But there has to be an easier wawy, since this only works for short rows
댓글 수: 0
채택된 답변
Honglei Chen
2012년 12월 11일
편집: Honglei Chen
2012년 12월 11일
You can use cumsum
y = cumsum(x)
You can also do
filter(ones(1,numel(x)),1,x)
댓글 수: 0
추가 답변 (0개)
참고 항목
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!