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How to identify the distribution of the data set?

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Ahmed Hamed
Ahmed Hamed 2016-6-30
评论： alex brown 2019-4-29
Given a data set (.mat file). How can I identify the distribution (Normal, Gaussian, etc) of the data in matlab? Is there any built-in function that helps to do this?
For example, I'd like to identify the distribution of the Ionosphere data set.

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采纳的回答

John
John 2016-7-1
Plot the histogram. Use 'hist'. Depending on the number of samples in the data set, you will want to increase the number of bins accordingly to get better resolution. As with all statistical analysis, the more data you sample, the better your fit will be.
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alex brown
alex brown 2019-4-29
Doubts about distribution of the answers generated by randfixedsum!
check this:
clc
close all
for i=1:1000
an(:,i)=randfixedsum(24,1,3600,5,300);
end
% histogram(an(1,:))
hold on
histogram(an(5,:))
untitled.jpg
look carefully at the distribution. I don't think it is uniformly distributed.

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更多回答（2 个）

Mohammad Tanhaemami
Image Analyst
Image Analyst 2016-7-3
Of course the histogram is the actual distribution. But if you want a model distribution, look into kstest(), kstest2(), lillietest(), etc.
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alex brown
alex brown 2019-4-29
Thank you for helping me. Is there any function for testing the uniform distribution?! what is the criteria for a distribution to be uniform?!

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