使用 m 代码/DAX 在 excel 中创建直方图

Question

我正在使用这个很棒的 tutorial。

let
    //Get data from Customers table
    Source = Excel.CurrentWorkbook(){[Name="Customers"]}[Content],
    //Get a list of all the values in the Age column
    Ages = Table.Column(Source,"Age"),
    //Find the maximum age
    MaxAge = List.Max(Ages),
    //The number of buckets is the max age divided by ten, then rounded up to the nearest integer
    NumberOfBuckets = Number.RoundUp(MaxAge/10),
    //Hash function to determine which bucket each customer goes into
    BucketHashFunction = (age) => Number.RoundDown(age/10),
    //Use Table.Partition() to split the table into multiple buckets
    CreateBuckets = Table.Partition(Source, "Age", NumberOfBuckets, BucketHashFunction),
    //Turn the resulting list into a table
    #"Table from List" = Table.FromList(CreateBuckets, Splitter.SplitByNothing()
                           , null, null, ExtraValues.Error),
    //Add a zero-based index column
    #"Added Index" = Table.AddIndexColumn(#"Table from List", "Index", 0, 1),
    //Calculate the name of each bucket
    #"Added Custom" = Table.AddColumn(#"Added Index", "Bucket", 
                        each Number.ToText([Index]*10) & " to " & Number.ToText(([Index]+1)*10)),
    //Find the number of rows in each bucket - ie the count of customers
    #"Added Custom1" = Table.AddColumn(#"Added Custom", "Count", each Table.RowCount([Column1])),
    //Remove unnecessary columns
    #"Removed Columns" = Table.RemoveColumns(#"Added Custom1",{"Column1", "Index"})
in
    #"Removed Columns"

最终结果是：

我想知道如何将所有年龄超过 50 岁的人都放入一个名为“50+”的桶中？

Answer 1

您需要更改行： BucketHashFunction = (age) => Number.RoundDown(age/10),

类似于： BucketHashFunction = (age) => if(age > 85) then "85+" else Number.RoundDown(age/10),

您还需要确保此行的数据类型正确：

"添加自定义" = Table.AddColumn(#"添加索引", "桶",

                    each Number.ToText([Index]*10) & " to " & Number.ToText(([Index]+1)*10)),

最好使用UI设置数据类型为字符串。我没有测试这个解决方案，但这基本上是要遵循的模式。

感谢您使用 Power BI。

Lukasz P.

微软 Power BI 团队

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使用 m 代码/DAX 在 excel 中创建直方图

Creating a histogram in excel using m code / DAX

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"添加自定义" = Table.AddColumn(#"添加索引", "桶",