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在輸入新數字時，如何平均一列的最後5個值？

在Excel中，您可以使用“平均值”功能快速計算一列中最後5個值的平均值，但是，您不時需要在原始數據後面輸入新的數字，並且您希望平均值會自動更改為輸入新數據。 也就是說，即使不時添加數字，您也希望平均值始終反映數據列表的最後5個數字。

列的最後5個值的平均值，作為使用公式輸入的新數字

箭頭藍色右氣泡 列的最後5個值的平均值，作為使用公式輸入的新數字

以下數組公式可以幫助您解決此問題，請執行以下操作：

在空白單元格中輸入以下公式：

=IF(COUNT(A:A),AVERAGE(INDEX(A:A,LARGE(IF(ISNUMBER(A1:A10000),ROW(A1:A10000)),MIN(5,COUNT(A1:A10000)))):A10000),"no data") (答： 是包含您使用的數據的列， A1：A10000 是動態範圍，您可以根據需要擴展它，並且數量 5 表示最後一個n值。），然後按 Ctrl + Shift + Enter 鍵一起獲得最後5個數字的平均值。 看截圖：

文檔平均最後 5-1

現在，當您在原始數據後面輸入新數字時，平均值也會隨之更改，請參見屏幕截圖：

文檔平均最後 5-2

備註：如果單元格列包含0個值，則要從最後0個數字中排除5個值，以上公式將不起作用，在這裡，我可以向您介紹另一個數組公式，以獲取最後5個非零值的平均值，請輸入以下公式：

=AVERAGE(SUBTOTAL(9,OFFSET(A1:A10000,LARGE(IF(A1:A10000>0,ROW(A1:A10000)-MIN(ROW(A1:A10000))),ROW(INDIRECT("1:5"))),0,1)))，然後按 Ctrl + Shift + Enter 獲得所需結果的鍵，請參見屏幕截圖：

文檔平均最後 5-3

相關文章：

如何在Excel中每5行或每列平均一次？

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Comments (11)
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Yves
Yves
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Bonjour,

La formule ne fonctionnant pas chez moi, et ayant un fort besoin de l'avoir, j'ai creusé l'affaire.
Je ne comprenais pas pourquoi utiliser la fonction LARGE qui n'est là que si on cherche la plus grande valeur d'une colonne, qui n'est pas forcément dans les 5 derniers.

Donc, voici une formule simple (en français, mais vous trouverez facilement l'équivalent anglais) :
=MOYENNE(INDEX(A2:A1000;NB(A2:A1000)-5+1):A1000)
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MandyZhou
MandyZhou     Yves
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Hello Yves,

You can use the simple formula: =AVERAGE(OFFSET(A1,COUNT(A:A),0,-5)). Please have a try. Please see the attached picture.

Sincerely,
Mandy
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Steve
Steve
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25% x (r) = (n), rounded up to the next whole number = (a) then the top (a) race points are averaged together to get the total race points (p) for the week.

Example: 25%x9 = 2.25 rounded up to 3. Top 3 races of the 9 races are averaged to get the total points for the week.

How do I create a formula in excel for this?
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J.Tombo
J.Tombo
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Hello, I would like average the lowest 10 values of the last 20 added to a set of data. After reading this one here and another one of your examples, I now know how to average the lowest 10 values of 20 and how to grab only the last 20 values for averaging, but I need to combine them so I only average the lowest 10 values of the last and or most resent 20 add to the set of data. Please let me know if you can help, thank you JT.
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Paul
Paul
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=IF(COUNT(A:A),AVERAGE(INDEX(A:A,LARGE(IF(ISNUMBER(A1:A10000),ROW(A1:A10000)),MIN(5,COUNT(A1:A10000)))):A10000),"no data")

Does not work for me.

Here is my version:
=IF(COUNT(C:C),AVERAGE(INDEX(C:C,LARGE(IF(ISNUMBER(C2:C10000),ROW(C2:C10000)),MIN(5,COUNT(C2:C10000))))):C10000)

The error I get is: Wrong data type.
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skyyang
skyyang     Paul
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Hello, Paul,
Do you press the Ctrl + Shift + Enter keys together after pasting the above formula?
Please try it.
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Don Helgeland
Don Helgeland     skyyang
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I tried the formual =IF(COUNT(A:A),AVERAGE(INDEX(A:A,LARGE(IF(ISNUMBER(A1:A10000),ROW(A1:A10000)),MIN(5,COUNT(A1:A10000)))):A10000),"no data") then did COMMAND RETURN on my Mac and the formula worked but it didn't average the lowest 10 of the last 20 values correctly.I would like to average the lowest 8 values of of the last or most recent 20 values in a dynamic range as I enter a new value every day. Any help would be greatly appreciated!
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skyyang
skyyang     Don Helgeland
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Hello, Don,To solve your problem, please apply the below array formula:=AVERAGE(SMALL(IF((A1:A10000<>0)*(IF(ISNUMBER(A1:A10000),ROW(A1:A10000))=LARGE(IF(ISNUMBER(A1:A10000),ROW(A1:A10000)),{1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20})),A1:A10000),{1,2,3,4,5,6,7,8}))
After inserting the formula, please press 
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Don Helgeland
Don Helgeland     skyyang
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Thank you! When I verify I do not get the correct value. My last 20 values are as follows: 0.0    0.2    8.9    2.9    8.1    8.1    8.1    5.3    8.1    0.4    6.6    -0.5    0.2    9.0    9.0    5.1    3.6    1.9    4.6    1.3Your array gives an average of 1.2 for the 8 lowest valuesMy average is 0.8 for the 8 lowest values.Not sure what went wrong?
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Don Helgeland
Don Helgeland     Don Helgeland
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I think it doesn't average zero. I tired <=> and that is not a solution.
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skyyang
skyyang     Don Helgeland
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Hi, Don,Yes, as you said, the formula exclude the 0s when averaging, if you want to average with 0s, please apply the below formula:=AVERAGE(SMALL(IF(ISNUMBER(A1:A10000)*(IF(ISNUMBER(A1:A10000),ROW(A1:A10000))=LARGE(IF(ISNUMBER(A1:A10000),ROW(A1:A10000)),{1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20})),A1:A10000),{1,2,3,4,5,6,7,8}))
Please remember to press Ctrl + Shift + Enter keys together.
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