How to extend the fit in histfit? (red line doesn't continue past a certain point)

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Jake Warner 2017-12-7

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https://ww2.mathworks.cn/matlabcentral/answers/371773-how-to-extend-the-fit-in-histfit-red-line-doesn-t-continue-past-a-certain-point

评论： Jake Warner 2017-12-7

I'm trying to use a gamma fit, or at times a generalized-pareto distribution fit to my histogram data. However, the fit doesn't seem to extend as for as my data goes on the x-axis. Are there options within this histfit function call I should be using? Or do I need to do pd = fitdist(data, 'gamma'). And then use that pd object to fit a distribution with my original x range?

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Image Analyst 2017-12-7

Post your data and code so people can work with it.

Jake Warner 2017-12-7

Unfortunately I cannot post the actual data set, but this is the command I ran: histfit(data, 10000, 'gamma') The 'data' is approximately 1 million data points. It is possible that is too many points for this to follow, or there is some implicit limit of the number of points it will show for the fit...?

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Answer 1

the cyclist 2017-12-7

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https://ww2.mathworks.cn/matlabcentral/answers/371773-how-to-extend-the-fit-in-histfit-red-line-doesn-t-continue-past-a-certain-point#answer_295262

编辑：the cyclist 2017-12-7

See my answer (and ensuing comment) to effectively the same question here. Looking inside the histfit function, it seems that it plot the fit out to 3 sigma.