Counting number of unique elements in a matrix

조회 수: 2 (최근 30일)
Matlab2010
Matlab2010 2013년 1월 10일
I have a matrix, 2xT. It contains value PAIRS that are unique and some that are repeated.
I would like to order the matrix by the pairs that occur the most frequently.
myData = randi([0 20], [10000 2]); %make up some data
[C,ia,ic] = unique(myData,'rows');
such that %isequal(C(ic,:), myData) =1. Great.
I now try and work out the ordering
[nOccurances IX] = sort(histc(ic, 1:length(ic)), 'descend');
This gives nOccurances which looks sensible.
Now I try and output:
myDataSorted = myData(ic(IX),:);
The output value is just wrong.
Where have I gone wrong? Thank you!!
  댓글 수: 2
Matlab2010
Matlab2010 2013년 1월 10일
편집: Matlab2010 2013년 1월 10일
SOLVED:
myData = randi([0 20], [10000 2]); %make up some data
[C,ia,ic] = unique(myData,'rows');
[nOccurances IX] = sort(histc(ic, 1:length(ic)), 'descend');
idY = (nOccurances==0);
nOccurances(idY) = [];
IX(idY) = [];
myDataSorted = [nOccurances C(IX,:)];
Matt J
Matt J 2013년 1월 10일
Then you should either delete the question or submit then Accept your own solution as an Answer

댓글을 달려면 로그인하십시오.

답변 (0개)

카테고리

Help CenterFile Exchange에서 Get Started with MATLAB에 대해 자세히 알아보기

태그

Community Treasure Hunt

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

Start Hunting!

Translated by