Finding 5th to 15th central moment
2 次查看(过去 30 天)
显示 更早的评论
Hello everybody, please help me i want to find 5th to 15th central moments of random 7×5 matrix , i dont know how to do it.I tried using moment(x,4)./(std(x)).^4 and cross checked it with kurtosis but this gave me wrong answer.
0 个评论
采纳的回答
Thiago Henrique Gomes Lobato
2020-9-6
The std function has a bias correction which the kurtosis doesn't, if you remove it you get the same result:
rng(31415)
A = randn(7,5);
moment(A,4)./(std(A,1)).^4 % the ,1 in the standard deviation removes the bias correction
kurtosis(A)
ans =
1.4861 1.9326 1.2991 2.0221 3.1096
ans =
1.4861 1.9326 1.2991 2.0221 3.1096
Calculating the other central moments should be then trivial, you just have to known how you want define your standard deviation.
更多回答(0 个)
另请参阅
类别
在 Help Center 和 File Exchange 中查找有关 Dynamic System Models 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!