Vector where elements equals previous elements + 1
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I wish to make a column vector where ecah element eqaul the previous element + 1. I also want to be able to decide by a loop how mane elements the vector should contain. Example: start =1;end=1 should give the vector [1}. start=1;end=3 should give the vector [1 2 3]. I hope someone has an idea about how to solve this.
1 个评论
Daniel Shub
2013-8-14
This is such a basic thing that I would really suggest you having another read of the manual.
采纳的回答
Andrei Bobrov
2013-8-14
do as wrote Daniel
OR
end1 = 3;
for jj = end1:-1:1
vector(jj) = jj;
end
2 个评论
Daniel Shub
2013-8-14
I am not convinced Karl will be able to figure out make that go from A to B ...
Karl
2013-8-15
更多回答（2 个）
Daniel Shub
2013-8-14
Using end is a bad choice since it is special in MATLAB. I think what you are asking for is
a:b
3 个评论
Karl
2013-8-14
Azzi Abdelmalek
2013-8-14
Why this is different from Daniel's answer?
n=5
a=1
b=n
out=a:b
Karl
2013-8-15
Azzi Abdelmalek
2013-8-14
a=[1 1 1)
out=cumsum(a)
4 个评论
Karl
2013-8-14
Daniel Shub
2013-8-14
Azzi, while I agree this works, why would you go this way?
Azzi Abdelmalek
2013-8-14
I've just misunderstood the question
Daniel Shub
2013-8-14
Ahh now I see. I can see how the description would lead you to think CUMSUM is the right answer.
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