Sort elements of Array by given condition
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Hello,
i have a vector n 480x1 and would like to sort the vector so that the condition
sum(([n ;0]-[0 ;n])>0)==68
is given. How could i do this? my approach was to realize a permutation of the vector until the condition is given. Unfortnely, this takes too much time.
Thanks in advance
5 个评论
Dyuman Joshi
2022-12-28
编辑：Dyuman Joshi
2022-12-28
That will depend upon the values of the vector.
You might not achieve that condition if all the values are monotonically increasing or decreasing.
Or do you want to change the indices of the values (jumble them up) to get this specific condition?
Daniel
2022-12-28
Dyuman Joshi
2022-12-28
Please attach your data using the paperclip button.
Although, I must say that it might be a challenging task to do so.
Daniel
2022-12-28
采纳的回答
n=load('vector').xr;
m=numel(n);
n=n(randperm(m));
loc=find(([n ;0]-[0 ;n])>0);
n(loc(68):end)=sort(n(loc(68):end),'descend');
sum(([n ;0]-[0 ;n])>0)
更多回答（1 个）
load('vector.mat')
XR1 = [xr;0]; XR2 = [0;xr];
IND = (XR1-XR2)>0;
ii = 1;
S = 0;
while S~=68
S(ii+1) = S(ii)+IND(ii);
ii=ii+1;
end
fprintf('Summation is halted at %d step and the sum is %d \n', ii, S(ii))
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