Computing an Expectation in Matlab

10 次查看（过去 30 天）
Shane Kosir
Shane Kosir 2017-2-25
编辑： Roger Stafford 2017-2-25
I'm trying to compute the sum of x*binopdf(x,18,.96) for values of x from 0 to 16. How can I do that? It keeps giving me errors.

请先登录，再回答此问题。

回答（1 个）

Roger Stafford
Roger Stafford 2017-2-25
The code
x = 0:16;
E = sum(x.*binopdf(x,18,.96));
should give you the answer.
  3 个评论
显示 1更早的评论
Roger Stafford
Roger Stafford 2017-2-25
编辑：Roger Stafford 2017-2-25
Is there some reason why your x ranges only over 0:16 and yet your N value in binopdf is equal to 18? As it stands, it will not give you the true expected value.
Also please tell me in what respect it "didn't work".
Walter Roberson
Walter Roberson 2017-2-25
When I use the above code, the value I get is _exactly the same as I get when I compute the precise value 36848322448959471846167088 / 14551915228366851806640625 through a different software package.

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Performance and Memory 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