Only abnormally large outlier values are removed, not small ones

3 vues (au cours des 30 derniers jours)
Lina Koronfel
Lina Koronfel le 26 Mar 2022
Commenté : Image Analyst le 26 Mar 2022
I used the rmoutlier function to remove outliers from a dataset but it only removed the abnormally large value, not the abnormally small one. Please see figure for reference. Also I used the following line of code:
[Array_wo_outliers(1,:), TF]=rmoutliers(Array_Original(1,:),'mean');
How can I remove both???
Thank you

Réponses (1)

AndresVar
AndresVar le 26 Mar 2022
your data has zeros that make the mean closer to the small peak.
you should ignore the zeros, maybe you can throw them away OR you can try setting them equal to the non-zero data mean.
load('testdatarmoutlier.mat')
ind0 = y==0; % where are the zeros
meannz = mean(y(~ind0)); % mean of non-zero data
figure;
plot(x,y,'rx')
yline(mean(y),'k',Label='mean (close to bottom!)')
yline(meannz,'k',Label='mean ingnore zeros')
y(ind0)=meannz; % make zeros equal to the non-zero data mean
[y2,ind]=rmoutliers(y,'mean');
y(ind0)=0; % restore zeros
figure;
plot(x(~ind),y(~ind),'x')
  1 commentaire
Image Analyst
Image Analyst le 26 Mar 2022
or threshold
threshold = 0.5;
y(y < threshold) = []; % Remove all values less than the threshold

Connectez-vous pour commenter.

Catégories

En savoir plus sur Live Scripts and Functions dans Help Center et File Exchange

Produits


Version

R2020b

Community Treasure Hunt

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

Start Hunting!

Translated by