DAX建議在PowerBI中生成特定的加權平均度量？

Question

我正在嘗試在PowerBi中為調查數據制定加權平均數。 我目前有以下兩個表（簡化）：

調查數據

ID           How would you score the service?      Do you agree with X?
---------------------------------------------------------------------------
23           Fair                                  Agree
24           Poor                                  Strongly disagree
25           Fair                                  Agree
26           Very poor                             *blank*
27           Very good                             Strongly agree

權重

Weight         Score         Likert
-------------------------------------------------
 1             Very poor     Strongly disagree
 2             Poor          Disagree
 3             Fair          Neither agree nor disagree
 4             Good          Agree
 5             Very good     Strongly Agree

目前， 'surveydata'[How would you score the service?]和'weights'[weight] 。

我嘗試計算的加權平均公式如下：

                (x1 * w1) + (x2 * w2) + ... (xn * wn)
Weighted Ave = ___________________________________________
                          x1 + x2 + ... xn

哪里：

w = weight of answer choice
x = response count for answer choice

對於上面的示例，我需要兩種度量- 'surveydata'[How would you score the service?]的加權平均值'surveydata'[How would you score the service?]和'surveydata'[How would you score the service?]的加權平均值'surveydata'[Do you agree with X?] 。

對於上面的示例， 'surveydata'[How would you score the service?]的加權平均數應為2.8。

請注意，並發症之一是存在*空白*單元格的事實。

誰能在PowerBI中提出一種通過計算的度量（或其他方法）做到這一點的方法？

Answer 1

您可以將SurveyData表中每一行的權重相加，然后除以行數

Weighted Ave =
DIVIDE(
    SUMX(SurveyData, RELATED(Weights[Weight])),
    COUNTROWS(SurveyData)
)

或者簡單地使用平均函數

Weighted Ave = AVERAGEX(SurveyData, RELATED(Weights[Weight]))