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How do I add a value to an adjacent element without for loop

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jake stan
jake stan 2018-3-23
评论： Birdman 2018-3-23
% x = zeros(1,7)
x(1) = 3
x(2) = 4
lengthofx = length(x)
x(3:end) = x(2:end-1)+1
I was wondering how to add a value to a next element without for loop? I'm given x(1) = 3, and x(2) is 4, and
I'm trying to add one to the next element so add 1 to element 3, then add 1 to element 3, and so on but this part
doesn't work: x(2:end) = x(1:end-1)+1.
It adds one to element 3 which becomes 5, but then when it reaches to element 4 it just adds 1 to it, so the element value is one instead of 6

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Birdman
Birdman 2018-3-23
Try this:
x=zeros(1,7);
x(1)=3;
x(2)=4;
x(find(x==0,1,'first'):end)=x(find(x~=0,1,'last'))+1:x(find(x~=0,1,'last'))+sum(x==0)
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jake stan
jake stan 2018-3-23
Oh it doesn't work when I want to change the addition value, so instead of adding one it adds like 6 or any number
Birdman
Birdman 2018-3-23
Ok, try this: By changing N, you will add any value you want,
x=zeros(1,9);
x(1)=3;
x(2)=4;
N=6
x(find(x==0,1,'first'):end)=(x(find(x==0,1,'first'))+1:N:N*(x(find(x==0,1,'first'))+sum(x==0)))+x(find(x~=0,1,'last'))-1+N

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