Find highest third of values in dateset?

조회 수: 7(최근 30일)
Peter Mills
Peter Mills 2018년 1월 12일
편집: Star Strider 2018년 1월 12일
WaveHeight=[3 1 5 2 3.1 6 5.5 3 2.5];
We need to find the highest 1/3:
HighestThird=[6 5.5 5]
But what if we what a function that will calculate the mean of the heights 1/3 of WaveHeight with the length of WaveHeight being a variable which may be large?
E.g.
WaveHeight=randi(1000,1,1000);
HighestThird=
  댓글 수: 1
Adam
Adam 2018년 1월 12일
"calculate the mean of the heights 1/3 of WaveHeight"
I don't understand what this means. What is it you want to take the mean of and what is it you want 1/3 of?
Since you are starting your own question here it makes sense to include your information here rather than reference a comment in another question with more information than this one. There is no guarantee that independent question (or the answer to which you replied) will not get deleted.

댓글을 달려면 로그인하십시오.

채택된 답변

Star Strider
Star Strider 2018년 1월 12일
편집: Star Strider 2018년 1월 12일
One approach is to use the sort function:
WaveHeight=[3 1 5 2 3.1 6 5.5 3 2.5];
[Waves,Idx] = sort(WaveHeight, 'descend');
HighestThird = WaveHeight(Idx(1:fix(numel(Idx)/3)))
HighestThird =
6 5.5 5
also:
HighestThird = Waves(1:fix(numel(Idx)/3))
with the same result.

추가 답변(0개)

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by