nchoosek help

2011 9 15
1 个回答
回答已采纳
10 次查看（30 天）

0 个投票

I am trying to figure out the nchoosek command but can't seem to get it. What I am trying to answer is if there are 4 people in a line, how many different ways can they be arranged. I tried nchoosek(1:4,4) but that returns the vector 1 2 3 4 and nchoosek(4,4) but that returns just a 1. What am I missing here?

1 个评论
显示 -1更早的评论 隐藏 -1更早的评论

Sean Smith
Sean Smith 2011-9-15
from what i have been reading n is the number of things and k is the number you take at a time, so shouldn't it be 4 and 4 because there are 4 things and you take them 4 at a time?

请先登录，再进行评论。

请先登录，再回答此问题。

 采纳的回答

Wayne King
Wayne King 2011-9-15

0 个投票

Hi Sean, 4 people in a line is just factorial(4). nchoosek assumes you are interested in how many ways you can choose a number of objects out of set where order is not important. Note that arrangement in a circle is different.
Wayne

更多回答（0 个）

类别

在 帮助中心 和 File Exchange 中查找有关 Mathematics 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by