Fitting the most appropriate distribution to data

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Hari krishnan 2018-10-16

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https://ww2.mathworks.cn/matlabcentral/answers/424327-fitting-the-most-appropriate-distribution-to-data

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I have data stored in the variable 'read_colony_observation_data_goodnest'. I am making a histogram of this data and trying to fit an exponential distribution to it. Rather than fitting one distribution, its giving me a series of fits. Any help will be appreciated.

 all_recruitment_colony_data = 'control_recruitment_duration_combined.xlsx';
 read_colony_observation_data_goodnest = xlsread(all_recruitment_colony_data);
 histogram(read_colony_observation_data_goodnest,'Normalization','pdf');
 xlabel('time (sec)')
 ylabel('pdf')
 hold on
 pd = fitdist(read_colony_observation_data_goodnest,'Exponential');
 y = pdf(pd,read_colony_observation_data_goodnest);
 plot(read_colony_observation_data_goodnest);