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

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Matlab2010 el 19 de Feb. de 2016
Respondida: the cyclist el 19 de Feb. de 2016
I am using 2015b. I read 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 comentario
Matlab2010 el 19 de Feb. de 2016
Editada: Matlab2010 el 19 de Feb. de 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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Respuestas (1)

the cyclist
the cyclist el 19 de Feb. de 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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