change in histogram distributions

2 vues (au cours des 30 derniers jours)
Sumera Yamin
Sumera Yamin le 9 Déc 2020
Modifié(e) : Sumera Yamin le 11 Déc 2020
Hi, is it possible to flip a histogram around the peak value? I do not want to flip the axis. Just for performing some checks, I want to invert my distribution from negative skewness to positive skewness, keeping the mean value at its original value. any help is appreciated.

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Théophane Dimier
Théophane Dimier le 9 Déc 2020
Modifié(e) : Théophane Dimier le 9 Déc 2020
Hi!
It should be doing the following (considering that a is your input)
[counts,center]=hist(a);
bar(center,counts);
hold on
center_mirror=flip(center);
bar(center_mirror,counts);
This should plot the histogram and the mirrored histogram.
If you want to force it to rotate around the peak (conservation of the mode of the distribution):
[counts,center]=hist(a);
bar(center,counts);
hold on
[~,idx]=max(counts);
center_mirror=2*center(idx)-center;
bar(center_mirror,counts);
I hope it answers your question!
  9 commentaires
Image Analyst
Image Analyst le 11 Déc 2020
The cryptic idx should have been called something more explicit and descriptive, like "indexOfMax". Basically it's the first index (bin number) where the max value (mode) of the histogram appears. Does that explain it better.
Sumera Yamin
Sumera Yamin le 11 Déc 2020
Modifié(e) : Sumera Yamin le 11 Déc 2020
ok, thanks, i understood it now.

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