[英]Calculating a Moving Average for 3 months without blank values in DAX Power BI
我有[Billable Minutes]值的客戶服務表。
我需要創建[3 個月的移動平均數]度量,其中計算只會發生 -如果[計費分鍾]中所有 3 個月的值都存在! (見下文)
如果我的客戶服務表中的[Billable Minutes]值在至少一個月內為空白,那么我希望[Moving Avg]將顯示為 0 或空白!
我的目標:
Client Services table: Result:
Period [Billable Minutes] Period [Moving Avg]
2018-11 200 2019-01 200
2018-12 300
2019-01 100
為了實現我的目標,我將以下 DAX 表達式用於[Moving Avg 3 months] :
Moving Avg 3 month =
VAR PeriodToUse = DATESINPERIOD('Calendar FY'[Date], LASTDATE('Calendar FY'[Date]), -3, MONTH)
VAR Result = CALCULATE(DIVIDE([Billable Minutes], COUNTROWS ('Calendar FY')), PeriodToUse)
VAR ZeroValue=IF(Minx('Client Services',[Billable Minutes])=0,0,Result)
Return Result
但是,不幸的是,我的最終結果是:
Client Services table: Result:
Period [Billable Minutes] Period [Moving Avg]
2018-11 200 2018-11 67
2018-12 300 2018-12 167
2019-01 100 2019-01 200
因此,它采用Client Services表中的現有值並將它們除以期間數。 例如對於 2018-11, 2018-10, 2018-09 - 它需要 (200+0+0)/3=66.6 (67 四舍五入) 但我需要 2018-11 的移動平均為空,因為沒有客戶服務表中 2018-10、2018-09 的值(相同 - 對於 2018-12,不應計算)
請幫忙!
更新:
這是對此的解決方案(感謝下面的答案)為了檢查所選期間是否為零,應創建額外的措施:
Billable Minutes
Moving Avg Prev Month = Calculate('Client Services'[Billable Minutes],
PREVIOUSMONTH('Calendar FY'[Date]))
Billable Minutes
Moving Avg 2nd Prev Month = Calculate
('Client Services'[Billable Minutes Prev Month],
PREVIOUSMONTH('Calendar FY'[Date]))
然后,當您檢查是否存在零值時 - 您需要檢查它 - 不僅針對 [可計費分鍾數],還針對 3 個月內的 [可計費分鍾數] = [可計費分鍾數]+[上個月可計費分鍾數]+ [上個月第 2 次計費分鍾數]
請參閱下面的更新(完美運行):
enter
Billable Minutes 3 Months Avg =
VAR PeriodToUse = DATESINPERIOD('Calendar FY'[Date],
LASTDATE('Calendar FY'[Date]), -3, MONTH)
VAR Result = CALCULATE(DIVIDE([Billable Minutes],
COUNTROWS ('Calendar FY')), PeriodToUse)
VAR NMonthsPeriodBlank =
if([Billable Minutes] = BLANK(),0,1) +
if([Billable Minutes Prev Month] = BLANK(),0,1) +
if([Billable Minutes 2nd Prev Month] = BLANK(),0,1)
RETURN IF(NMonthsPeriodBlank < 3, BLANK(), Result)
請按照以下步驟操作-
第 1 步:將您的Period列轉換為 Date,考慮每月的第一個日期,如下所示-
第 2 步:單擊“關閉並應用”返回報告並創建以下 4 項措施-
total = SUM('Client Services'[Billable Minutes])
total prev = CALCULATE([total],PREVIOUSMONTH('Client Services'[Period]))
total second prev = CALCULATE([total prev],PREVIOUSMONTH('Client Services'[Period]))
3 month avergae =
VAR devide_by = if([total] = BLANK(),0,1) + if([total prev] = BLANK(),0,1) + if([total second prev] = BLANK(),0,1)
VAR total_amount = [total] + [total prev] + [total second prev]
RETURN IF(
devide_by < 3,
BLANK(),
total_amount/devide_by
)
這是最終的輸出 -
====================解在單一測量====================
您可以將所有度量轉換為 1 個度量,如下所示-
3 month average new =
VAR this_month = SUM('Client Services'[Billable Minutes])
VAR prev_month =
CALCULATE(
SUM('Client Services'[Billable Minutes]),
PREVIOUSMONTH('Client Services'[Period])
)
VAR second_prev_month =
CALCULATE(
SUM('Client Services'[Billable Minutes]),
PREVIOUSMONTH(
DATEADD(
'Client Services'[Period],
-1,
MONTH
)
)
)
VAR devide_by =
if(this_month = BLANK(),0,1) +
if(prev_month = BLANK(),0,1) +
if(second_prev_month = BLANK(),0,1)
VAR total_amount = this_month + prev_month + second_prev_month
RETURN IF(
devide_by < 3,
BLANK(),
total_amount/devide_by
)
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