Negative values in lognormal distribution (lognfit)

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Kash022 2017-7-11

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https://ww2.mathworks.cn/matlabcentral/answers/348240-negative-values-in-lognormal-distribution-lognfit

评论： Jan 2017-7-12

I have a 1 x 4000 vector which also contains some negative values. The shape seems to resemble a log normal distribution but the lognfit will not work because of the negative values. Please suggest a workaround for this. What distribution should I use, if not lognormal? Or if I want to continue using lognormal how to do it?

Thanks,

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Jan 2017-7-12

The question is not clear, because the readers cannot guess how the negative values should be treated. If you get them from a valid measurement, and do not want to ignore them, there is no way to fit them to a distribution, which does not allow negative values. There is not even a "workaround" for this, because you ask for something, which is not mathematically meaningful. Then even posting multiple threads for the same question does not help.

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