Menu
×
   ❮     
HTML CSS JAVASCRIPT SQL PYTHON JAVA PHP HOW TO W3.CSS C C++ C# BOOTSTRAP REACT MYSQL JQUERY EXCEL XML DJANGO NUMPY PANDAS NODEJS R TYPESCRIPT ANGULAR GIT POSTGRESQL MONGODB ASP AI GO KOTLIN SASS VUE DSA GEN AI SCIPY AWS CYBERSECURITY DATA SCIENCE
     ❯   

多项分布


多项分布

多项分布是二项分布的推广。

它描述了多项式场景的结果,不像二项分布,二项分布的场景必须是两种情况之一。例如,人口的血型,骰子掷出的结果。

它有三个参数

n - 可能结果的数量(例如,骰子掷出的结果为 6)。

pvals - 结果概率的列表(例如,骰子掷出的结果为 [1/6, 1/6, 1/6, 1/6, 1/6, 1/6])。

size - 返回数组的形状。

示例

模拟骰子掷出的结果

from numpy import random

x = random.multinomial(n=6, pvals=[1/6, 1/6, 1/6, 1/6, 1/6, 1/6])

print(x)
自己尝试 »

注意:多项分布样本不会产生单个值!它们会为每个 pval 生成一个值。

注意:由于它们是二项分布的推广,因此它们的视觉表示和与正态分布的相似性与多个二项分布相同。



×

Contact Sales

If you want to use W3Schools services as an educational institution, team or enterprise, send us an e-mail:
[email protected]

Report Error

If you want to report an error, or if you want to make a suggestion, send us an e-mail:
[email protected]

W3Schools is optimized for learning and training. Examples might be simplified to improve reading and learning. Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content. While using W3Schools, you agree to have read and accepted our terms of use, cookie and privacy policy.

Copyright 1999-2024 by Refsnes Data. All Rights Reserved. W3Schools is Powered by W3.CSS.