# How to eliminate NaN in pearsrnd function in Matlab

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Thamasha Samarasinghe il 8 Ott 2021
Hi,
I have a data set which has
mu=3.82
sigma=1.023
skew=-1.021
kurt=1.284.
When I put them in r=pearsrnd(mu,sigma,skew,kurt,39,1) function, I am getting NaN value for 'r'. Could anyone can please help me to eliminate NaN in here?
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Thamasha Samarasinghe il 8 Ott 2021
Since the above combination gives me the NaN value I tried to solve that as follows.
mu=3.82;
sigma=1.023;
x=normrnd(3.82,1.023,39,1);
skew=skewness(x);
kurt=kurtosis(x);
r=pearsrnd(mu,sigma,skew,kurt,39,1);
Could someone please tell me that method is correct or not?

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### Risposta accettata

Shivam Singh il 11 Ott 2021
Some combinations of moments are not valid; in particular, the kurtosis must be greater than the square of the skewness plus 1. For more information, please refer to the "pearsrnd" function .
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Thamasha Samarasinghe il 11 Ott 2021
Thank you. Then do you know any other function that i can use for this combination instead of pearsrnd function ?

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