Output as NaN using pearsrnd command ?

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Raj Arora
Raj Arora 2021-7-2
评论： Thamasha Samarasinghe 2021-10-8
Pearsrnd is used for generating random samples of pearson distribtuion ?
mu = 4.9603;
Sigma = 1.1161;
Skew = -0.5666
kurt = -1.1129
r = pearsrnd(mu,Sigma,Skew,kurt,2000,1)
This command is showing NaN as output can anyone please help me with this,
Is it possible to get random samples for the log pearson type III distribution if I use logarithmic data parameters instead of actual data parameters?

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回答（1 个）

Walter Roberson
Walter Roberson 2021-7-2
According to the doc
"Some combinations of moments are not valid; in particular, the kurtosis must be greater than the square of the skewness plus 1."
However that is not the case for your kurt -- negative kurtosis is not greater than the square of any real value.
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Thamasha Samarasinghe
Thamasha Samarasinghe 2021-10-8
then do you know how to solve this? because I have the same problem in my data set.

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