有没有一种特定的方法可以在PowerBI的列中有条件地创建平均值？

Question

样本数据：

Lang|Book_Type|Numbers|Weight
--------------------------------
A   |  B1     |  20   | 5 
------------------------
B   |  B1     |  20   | 4
------------------------
C   |  B1     |  30   | 3
------------------------
A   |  B2     |  40   | 5
------------------------
B   |  B2     |  20   | 4
------------------------
C   |  B2     |  50   | 10
------------------------
A   |  B3     |  20   | 2
------------------------
B   |  B3     |  20   | 5
------------------------
C   |  B3     |  50   | 10

因此，基本上，这里的问题陈述是我希望另一列/度量的每种书本类型的平均百分比为％，例如：

B1：A：20 /（20 + 20 + 30）= 28.5％B：28.5％C：42.8％ B2：A：40 /（40 + 20 + 50）= 36.36％B：18.18％C：45.45％ B2：A：20 /（20 + 20 + 50）= 22.22％B：22.22％C：55.56％

A：平均值（28.5％* 5,36.36％* 5,55.56％* 2）或463.92 /（5 + 5 + 2）或38.66

同样，对于B＆C。

我尝试使用每个类别的加权平均值，但数字似乎并不十分准确。还有另一种方法吗？

Answer 1

用作数据集（NewTable）：

TAVG = 
DATATABLE(
    "Lang", STRING,
    "Book_Type", STRING,
    "value", INTEGER,
    "Weight", INTEGER,
    {
{"A","B1","20","5" }, 
{"B","B1","20","4" },
{"C","B1","30","3" },
{"A","B2","40","5" },
{"B","B2","20","4" },
{"C","B2","50","10"},
{"A","B3","20","2" },
{"B","B3","20","5" },
{"C","B3","50","10"}

    }
)

简单的AVG：

Average% =
DIVIDE (
    SELECTEDVALUE ( TAVG[value] ),
    CALCULATE (
        SUM ( TAVG[value] ),
        FILTER ( ALL ( TAVG ), TAVG[Book_Type] = SELECTEDVALUE ( TAVG[Book_Type] ) )
    )
)

然后您可以为以下内容编写另一种度量标准：

W_avg = SUMX(TAVG, TAVG[Weight] * TAVG[Average%])