生成总和为常数K - Excel的N个随机数 [英] Generate N random numbers whose sum is a constant K - Excel

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问题描述

如何在Excel中生成这些数字。



我必须生成总和为320的8个随机数,我需要大约100个左右。
http://en.wikipedia.org/wiki/User:Skinnerd/Simplex_Point_Picking 。这里有两种方法。



或任何其他方式,所以我可以在Excel中执行。

解决方案

您可以使用 RAND()函数生成 N 数字(您的然后,在列B中,您可以使用以下公式: B1 = A1 / SUM(A:A)* 320 B2 = A2 / SUM(A:A)* 320 等等(其中 320 是您感兴趣的金额)。



所以你可以输入 = RAND() A1,然后将其拖到A8。然后在B1中输入 = A1 / SUM(A:A)* 320 并将其拖动到B8。 B1:B8现在包含8个随机数,总和高达320.



样本输出:




How can I generate those numbers in Excel.

I have to generate 8 random numbers whose sum is always 320. I need around 100 sets or so. http://en.wikipedia.org/wiki/User:Skinnerd/Simplex_Point_Picking. Two methods are explained here.

Or any other way so I can do it in Excel.

解决方案

You could use the RAND() function to generate N numbers (8 in your case) in column A.

Then, in column B you could use the following formula B1=A1/SUM(A:A)*320, B2=A2/SUM(A:A)*320 and so on (where 320 is the sum that you are interested into).

So you can just enter =RAND() in A1, then drag it down to A8. Then enter =A1/SUM(A:A)*320 in B1 and drag it to B8. B1:B8 now contains 8 random numbers that sum up to 320.

Sample output:

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