grouping data by value
17 Ansichten (letzte 30 Tage)
Ältere Kommentare anzeigen
wesso Dadoyan
am 4 Aug. 2015
Kommentiert: Chanaka Keerthisinghe
am 7 Jun. 2018
I have a vector of data X that I want to divide into 10 different groups depending on the values. i,e the highest 10% together, then the lower 10% together etc.... How can I create another vector that assigns numbers to such groups. For example highest 10% should have a value of 1, then the lower 10% a value of 2 , ... then the lowest 10% a value of 10. I used :
DecileThresholds= quantile(X,(1:9)/10);
to find the points that separates the categories but I don't want to write a loop to categorize them. I thought that matlab probably has a function that automatically and elegantly give me the category number. Thanks
2 Kommentare
Image Analyst
am 4 Aug. 2015
It's not clear to me. Let's say you have a normal distribution with 1000 elements with values going from 0 to 10. Do you want 10 arrays where each array has 100 (which is 10% of 1000) elements? Or do you want 10 arrays where each array can have a different number of elements, because the number of elements in the range 500-600 will be more than the number with values in the range 0-100?
Akzeptierte Antwort
Weitere Antworten (1)
Azzi Abdelmalek
am 4 Aug. 2015
A=rand(1,106);
n=numel(A);
[b,idx]=sort(A);
m=round(n/10);
p=n-m*9;
ii=repmat(1:9,m,1);
jj=[ii(:) ;10*ones(p,1)];
out=accumarray(jj,b',[],@(x) {x});
celldisp(out)
Siehe auch
Kategorien
Mehr zu Data Distribution Plots finden Sie in Help Center und File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!