Effacer les filtres
Effacer les filtres

Error using fitdist. Distribution name 'multinomial' is unrecognized.

3 vues (au cours des 30 derniers jours)
Matlab2010 le 19 Fév 2016
I am using 2015b. I read http://uk.mathworks.com/help/stats/fitdist.html and see that it supports "multinomial"
I run
pd = makedist('Multinomial','probabilities',[1/2 1/3 1/6])
pd =
0.5 0.33333 0.16667
Then I run
fitdist([1 10]','normal')
ans =
Normal distribution
mu = 5.5 [-51.6779, 62.6779]
sigma = 6.36396 [2.83928, 203.075]
Then I try and run
fitdist([1 10]','multinomial')
Error using fitdist (line 146)
Distribution name 'multinomial' is unrecognized.
I do not understand why. Please advise.
  1 commentaire
Matlab2010 le 19 Fév 2016
Modifié(e) : Matlab2010 le 19 Fév 2016
Possible work around
function ksd = fitdist2(data)
data(isnan(data)) = [];
u = unique(data);
h = histcounts(data,u);
pd = makedist('Multinomial','probabilities',h./sum(h));
ksd.pd = pd;
ksd.u = u;
%sample: ksd.u(ksd.pd.random)

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Réponses (1)

the cyclist
the cyclist le 19 Fév 2016
I believe that this may be a documentation error. If you actually look inside the fitdist function, using
edit fitdist
you'll see that 'Multinomial' is not in the list of supported distributions. (But 'Kernel' is not there either, and actually does work.)
Weird. You might want to report to support@mathworks.


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